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DIABETES

borders, from diabainō. See DIABETES.] Passing beyond the borders of a place. Mitford

Diabetes (di-a-bê'têz), n. [Gr. diabētēs, from diabaine, to pass through-dia, and baino, to go or pass] In med. a disease characterized by great augmentation and often manifest alteration in the secretion of urine. There are two varieties; the one is merely a superabundant discharge of ordinary urine, and is termed diabetes insipidus; in the other the urine has a sweet taste, and contains abundance of a peculiar saccharine matter (diabetic sugar); this variety is called diabetes mellitus. This disease usually attacks persons of a debilitated constitution towards the decline of life, and generally without any obvious cause. Thirst and a voracious appetite are its first symptoms; the urine gradually increases in quantity; and then there is a sense of weight and uneasiness in the loins, emaciation, oedematous legs, and hectic fever.

Diabetic, Diabetical (di-a-bet'ik, dī-a-bēt'ik-al), a. Pertaining to diabetes.-Diabetic sugar (CHO. H2O), the sweet principle of diabetic urine. It is identical with starchsugar, grape-sugar, sugar of fruits, &c., the name common to all of which is dextroglucose. See DEXTRO-GLUCOSE.

Diablerie, Diablery (di-a'ble-ri), n. [Fr. diablerie.] 1. Mischief; wickedness; devilry. Craig-2 Incantation; sorcery; witchcraft. Clarke.

Diabolic, Diabolical (di-a-bolik, di-a-bol'ik-al), a. [L. diabolus, the devil. See DEVIL] Devilish; pertaining to the devil; partaking of the qualities of the devil; hence, infernal; impious; atrocious; nefarious; outrageously wicked; as, a diabolical temper; a diabolical scheme or action.

Diabolically (di-a-bol'ik-al-li), adv. In a diabolical manner; very wickedly; nefariously.

Diabolicalness (di-a-bol'ik-al-nes), n. The state or quality of being diabolical; devilishness; outrageousness; atrocity. Warton. Diabolify (di-a-bol'i-fi), v. t. To ascribe diabolical qualities to. [Rare.]

The Lutheran (turns) against the Calvinist, and danbolifer him. Farindon.

Diabolism (di-ab'ol-izm), n. 1. The actions of the devil; conduct worthy of a devil. "Guilty of diabolism.' Sir T. Browne.2 Possession by the devil. "The farce of diabolisms and exorcisms. Warburton. Diabolize (di-ab'ol-iz), v.t. To render diabolical or devilish. Eclec. Rev. [Rare.] Diabrosis (di-a-bro'sis), n. [Gr., corrosiondía, intens, and bibröskō, to eat.] In surg. the action of corrosive substances, which possess a property intermediate between caustics and escharotics.

Diacatholicon (di'a-ka-thol"ik-on), n. [Gr. dia, and katholikos, universal.] A kind of purgative medicine: so called from its general usefulness.

Diacaustic (di-a-kas'tik), a. [Gr. prefix dia, through and E. caustic from Gr. kaustikos, from kais or kao, to burn or inflame.] In math, belonging to a species of caustic curves formed by refraction. If rays Pm, issuing from a luminous point P, be refracted by

Diacaustic Curve.

the curve Am B, so that the sines of incidence are to the sines of refraction in a given ratio; the curve CDH, which touches all the refracted rays, is called the diacaustic curve or caustic by refraction. See CAUSTIC.

The principle, being once established, was applied to atmospheric refractions, optical instruments, diaenuatic curves (that is, the curves of intense light produced by refraction), and to various other cases. Whewell. Diacaustic (di-a-kas'tik), n. 1. In med. that which is caustic, or burns by refraction, as the sun's rays concentrated by a double convex lens, sometimes employed to cauterize an ulcer-2 A diacaustic curve. See the adjective.

Diachylon, Diachylum (di-a'ki-lon, di-a'ki-lum), n. [Gr. diachylos, very_juicy-dia, through, and chylos, juice.] In med. an

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emollient plaster originally composed of the juices of herbs, but now made by beating together olive-oil and finely pounded litharge. It is used for curing ulcers, and is the basis of most officinal plasters. Diachyma (di-a'ki-ma), n. [Gr. dia, and chyma, liquid.] In bot. the parenchyma, or green cellular matter of leaves. Diaconal (di-ak'on-al), a. [L. diaconus, Gr. diakonos, a deacon.] Administering by assiduous offices; pertaining to a deacon. Diaconate (di-ak'on-āt), n. 1. The office or dignity of a deacon.-2. A body of deacons. Diaconate (di-ak'on-at), a. Superintended or managed by deacons. 'One great diaconate church.' Goodwin. Diacope (di-a'ko-pě), n. [Gr. diakope, a cutting in two, a notch, a cleft-dia, and kopto, to cut.] 1. Ingram. tmesis; a cutting a word in two and inserting one or more words between them; as, 'of whom be thou ware.'-2. A genus of fishes of the section Acanthopterygii and family Percida, distinguished from other genera of the family by a notch at the lower part of the preoperculum, to which a projecting tubercle is attached. Many large and beautiful species of this genus inhabit the Indian seas. Some of them are upwards of 3 feet long. Diacoustic (di-a-kous'tik), a. [Gr. diakouō, to hear-dia, and akouō, to hear.] Pertaining to the science or doctrine of refracted sounds.

Diacoustics (di-a-kous'tiks), n. [See adjective.] The science or doctrine of refracted sounds; the consideration of the properties of sound refracted by passing through different mediums. Called also Diaphonics. Diacritical, Diacritic (di-a-krit'ik-al, di-akrit'ik), a. [Gr. diakritikos, able to distinguish, from diakrino, to separate-dia, and krino, to separate.] That separates or distinguishes; distinctive; as, a diacritical point. -Diacritical mark, a mark used in some languages to distinguish letters which are similar in form. Thus, in the German running-hand the letter u is written thus, u, to distinguish it from n.

Diadelph (di'a-delf), n. [Gr. di for dis, twice, and adelphos, a brother.] In bot. a plant the stamens of which are united into two bodies or bundles by their filaments. Diadelphia (di-a-del'fi-a), n. pl. The name given by Linnæus to his seventeenth class of plants. It consists chiefly of leguminous genera.

Diadelphous, Diadelphian (di-a-delf'us, di-a-delf'i-an), a.

Diadelphous Stamens of Indigofera tinctoria.

In bot. having its stamens united in two bundles by their filaments, the bundles being equal or unequal; grouped together in two bundles; as, diadelphous stamens. In papilionaceous flowers, out of ten stamens nine are often united while one (the posterior one) is free. Diadem (di'a-dem), n. [Gr. diadema, from diadeo, to gird-dia, and deō, to bind.] 1. Anciently, a head-band or fillet worn by kings as a badge of royalty. It was made of silk, linen, or wool, and tied round the temples and forehead, the ends being tied behind and let fall on the neck. It was usually white and plain; sometimes

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DIAGONAL

A

Diadem (di'a-dem), v. t. To adorn with or as with a diadem; to crown. Diadem'd with rays divine.' Pope. [Rare.] Diadem-spider (di'a-dem-spi-der), n. name sometimes given to the common garden-spider, perhaps from the markings upon the dorsal surface of its abdomen. See GARDEN-SPIDER.

Diadexis (di-a-deks'is), n. [Gr. diadexis, a taking from another, from diadechomai, to receive.] In pathol. a transformation of a disease into another, differing from the former both in its nature and seat. Diadrom (di'a-drom), n. [Gr. diadromos, a running through-dia, through, and dromos, a running.] A course or passing; a vibration; the time in which the vibration of a pendulum is performed.

A philosophical foot one third of a pendulum, whose diadroms, in the latitude of forty-five degrees, are equal to one second of time, or a sixtieth of a minute. Locke.

Diæresis, Dieresis (di-e're-sis or di-e're-sis), n. [Gr. diairesis, from diaireō, to divide dia, and haireo, to take, to seize.] Separ ation, particularly of one syllable into two; also the mark": which signifies a division, as in naïf; dialysis.

Diaglyphic (di-a-glif'ik), a. [Gr. dia, and glypho, to carve.] A term applied to sculpture, engraving, &c., in which the objects are sunk into the general surface. Diagnose (di-ag-nos), v.t. pret. & pp. diagnosed; ppr. diagnosing. [See DIAGNOSIS.] In pathol. to distinguish; to discriminate; to ascertain from symptoms the true nature and seat of, as a disease.

Diagnosis (di-ag-no'sis), n. [Gr. diagnosis, from diagignosko, to distinguish.] Scientific discrimination of any kind; a short distinctive description, as of plants; more specifically, in med. the discrimination of diseases by their distinctive marks or symptoms. This is one of the most important branches of medical knowledge.

Diagnostic (di-ag-nos'tik), a. [Gr. diagnostikos, able to distinguish, from diagignöskodia, and gignōskō, to know.] Distinguishing; characteristic; indicating the nature of a disease.

Diagnostic (di-ag-nos'tik), n. 1. The sign or symptom by which a disease is known or distinguished from others. Diagnostics are of two kinds-the adjunct, or such as are common to several diseases; and the special or pathognomonic, which always attend the disease, and distinguish it from all others. 2. pl. The department of medicine consisting in the study of the symptoms by which one disease is distinguished from another; symptomatology.

To

But Radcliffe, who, with coarse manners and little book learning, had raised himself to the first practice in London chiefly by his rare skill in diagnostics, uttered the more alarming words-small-pox. Macaulay Diagnosticate (di-ag-nos'tik-at), v.t. diagnose (which see). Diagometer (di-ag-om'e-tèr), n. [Gr. diagō, to conduct, and metron, a measure.] An electrical apparatus used by Rousseau for ascertaining the conducting power of oil, as a means of detecting its adulteration. It consists of a dry pile, by means of which a current is passed through the oil, and the strength of the current is determined by a magnetized needle. Want of conducting power diminishes the current, and therefore the deviation of the needle. Diagonal (di-ag'on-al), a. [Gr. diagônios, from angle to angle-dia, and gonia, an angle or corner.] 1. In geom. extending from one angle to the opposite of a quadrilateral figure, and dividing it into two equal parts.-2. Being in an angular direction. Diagonal scale, a scale which consists of a set of parallel lines drawn on a ruler, with lines crossing them at right angles and at equal distances. One of these equal divisions, namely, that at the extremity of the ruler, is subdivided into a number of equal parts, and lines are

Diagonal Scale.

drawn through the points of division obliquely across the parallels. With the help of the compasses such a scale facilitates the

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Diagram (di'a-gram), n. [Gr. diagramma. that which is marked out by lines-dia, and graphō, to write.] 1. In geom. a figure, drawing, or scheme delineated for the purpose of demonstrating the properties of any figure, as square, triangle, circle, &c. - 2. Any illustrative figure; especially, one wherein the outlines are exclusively

a

or

Diagram.

chiefly delineated; an illustrative table exhibiting the outlines of any subject. Such diagrams are now much used by public lecturers and in educational works.-3. In ancient music, a table representing all the sounds of the system; a musical scale. Diagrammatic (di'a-gram-mat"ik), a. Pertaining or relating to, or partaking of the nature of, a diagram; represented by means of a diagram; consisting of a diagram.

Aristotle undoubtedly had in his eye, when he discriminates the syllogistic terms, a certain diagrammatic contrast of the figures. Sir W. Hamilton. Diagrammatically (di'a-gram-mat”ik-alli), adv. After the manner of a diagram.

For the first syllogistic figure, the terms, without authority from Aristotle, are diagrammatically placed upon a level. Sir W. Hamilton. Diagraph (di'a-graf), n. [Gr. dia, and graphs, to describe.] An instrument for reproducing, without its being necessary to know drawing or prospective, the figure of objects before the eyes.

Diagraphic, Diagraphical (di-a-graf’ik, di-a-graf'ik-al), a. (Gr. dia, and grapho, to describe.] Descriptive. Diagraphics (di-a-graf'iks), n. The art of design or drawing.

Dial (di'al), n. [LL dialis, daily, from L. dies, a day ] 1. An instrument for showing the hour of the day from the shadow thrown by a stile or gnomon upon a graduated surface. When the shadow is cast by the sun it is called a sun-dial (which see).-2. The face of a watch, clock, or other timekeeper, on which the time of the day is indicated. 3. A clock; a watch.

He drew a dial from his poke;

And looking on it with lack-lustre eye,
Says, very wisely, 'It is ten o'clock;"

Shak

Thus we may see,' quoth he, how the world wags.' 4. A miner's compass. Wright.-5. Any plate or face on which a pointer or index revolves, moves backwards and forwards, or oscillates, marking revolutions, pressure, &c., according to the nature of the machinery of which it forms part; as, the dial of a steamgauge, gas-meter, or telegraphic instrument. -Night or nocturnal dial, an instrument for showing the hour by the shadow of the moon. Such instruments may be constructed relative to the motions of the moon; or the hour may be found by calculation from the moon's shadow on a sun-dial.

Dial (di'al), v.t. pret. & pp. dialled; ppr. dialling. 1. To measure with, or as with, a dial; to indicate upon, or as upon, a dial. Hours of that true time which is dialled in heaven Talfourd.-2. In mining, to survey by means of a dial.

Dialect (di'a-lekt), n. [Gr. dialektos, conversation, speech, from dialego, to converse dia, and lego, to speak; Fr. dialecte] 1. The form or idiom of a language peculiar to a province or to a limited region or people, as distinguished from the literary fanguage of the whole people, and consisting chiefly in differences of orthography or pronunciation. The Greek language is remarkable for four dialects-the Attic, Ionic, Doric, and Eolic. A dialect is the

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branch of a parent language, with such local modifications as time, accident, and revolutions may have introduced among descendants of the same stock or family living in separate or remote situations. But in regard to a large portion of words many languages which are considered as distinct are really dialects of one common tongue. In many cases dialects exhibit more accurately the ancient form of this common tongue, and are less corrupted or modified than the literary language.-2. Language; speech or manner of speaking.

If the conferring of a kindness did not bind the person upon whom it was conferred, to the returns of gratitude, why, in the universal dialect of the world, are kindnesses still called obligations? South. SYN. Language, tongue, speech, idiom, phraseology.

Dialectal (di-a-lek'tal), a. Same as Dialectic. Dialectic, Dialectical (di-a-lek'tik, di-alek'tik-al), a. 1. Pertaining to a dialect or dialects; not radical.-2. Logical; argumental. Dialectical subtleties." Boyle. Dialectic, n. See DIALECTICS. Dialectically (di-a-lek'tik-al-li), adv. In the manner of a dialect.

Dialectician (di ́a-lek-ti" shan), n.

One

skilled in dialectics; a logician; a reasoner. Dialectics, Dialectic (di-a-lek'tiks, di-a-lek'tik), n. [Gr. dialektike (techne), the act of discussing, from dialego. See DIALECT.]—1. (In the first form.) The name given to the art of reasoning or disputing, or that branch of logic which teaches the rules and modes of reasoning, or of distinguishing truth from error; the method of investigating the truth by analysis; also, the science of ideas or of the nature and laws of being. Later it came to signify the art of using forms of reasoning so as to make fallacies pass for truth; word-fence.-2. (Also in the first form.) The logic of probabilities, as opposed to the doctrine of demonstration and scientific deduction.-3. (In the second form.) In Kant's philos. the logic of appearance, as distinguished from universal logic, or that which teaches us to excite appearance or illusion. As logical or formal, it treats of the sources of error and illusion, and the mode of destroying them; as transcendental, it is the exposure of the natural and unavoidable illusion that arises from human reason itself, which is ever inclined to look upon phenomena as things in themselves, and cognitions a priori as properties adhering to these things, and in such way to form the super-sensible, according to this assumed cognition of things in themselves.

We termed Dialectic in general a logic of appear. ance. This does not signify a doctrine of probability; for probability is truth, only cognized upon insufficient grounds, and though the information it gives us is imperfect, it is not therefore deceitful.

Kant, translated by Meiklejohn.

4. (Also in the second form.) The method of dividing and subdividing, dissecting and analyzing a topic, so that we may be directed to the various lines of argument by which it may be approached, investigated, defended, or attacked: contrasted with logic, whose province it is to criticise these arguments, so as to reject the sophistical, and allow their exact weight to the solid. Taylor.

Art does not analyze, or abstract, or classify, or generalize; it does not lay bare the mechanism of thought, or evolve by the process of a rigid dialectic the secret order and systein of nature and history. Dr. Caird.

Dialectology (di'a-lek-tol'o-ji), n. That branch of philology which examines the nature and relations of dialects. Beck. [Rare.]

Dialector (di'a-lek-tér), n. One skilled in

dialectics.

Dialist (di'al-ist), n. A constructor of dials; one skilled in dialling. Diallage (di'al-aj or di-al'la-jë), n. [Gr. | diallage, an interchange, difference--dia, and allasso, to make other than it is, to change.] A silico-magnesian mineral of a lamellar or foliated structure. Its sub-species are green diallage, hypersthene, and bronzite. The metalloidal sub-species is called schillerstein, or schiller spar. It forms diallage rock, and enters into serpentine. Diallage (di-al'la-jë), n. [See previous entry. In rhet. a figure of speech by which arguments are placed in various points of view, and then brought to bear all upon one point.

Diallel (di'al-lel), a. Meeting and intersecting, as lines; crossing; not parallel. Ash.

Dialling (di'al-ing), n. The art of construct

DIALYSIS

ing dials; the science which explains the principles of measuring time by the sundial.-Dialling lines or scale, graduated lines placed on rulers, or the edges of quadrants and other instruments, to facilitate the construction of dials. -Dialling sphere, an instrument made of brass, with several semicircles sliding over each other upon a movable horizon, serving to demonstrate the nature of spherical triangles, as well as to give the true idea of drawing dials on all sorts of planes.

Dial-lock (di'al-lok), n. A lock provided with one or more dials, each with a hand or pointer connected with the mechanism of the lock in such a way that the bolt will not move unless the hands are set in a particular manner.

Diallogite (di-al'lo-jit), n. [See DIALLAGE.] A mineral of a rose-red colour, with a laminar structure and vitreous lustre. It is a carbonate of manganese, more or less mixed with the carbonate of lime. Diallyl (di-al'lil), n. See ALLYL. Dialogical (di-a-loj'ik-al), a. Pertaining to, or partaking of the nature of, a dialogue; dialogistic. Burton.

Dialogically (di-a-loj'ik-al-li), adv. In the manner of a dialogue; dialogistically. Goldsmith.

Dialogism (di-al'o-jizm), n. A feigned speech between two or more; a mode of writing dialogue in the third person; oblique or indirect narrative.

Dialogist (di-al'o-jist), n. [See DIALOGUE.] 1. A speaker in a dialogue.-2. A writer of dialogues.

Dialogistic, Dialogistical (di-al'o-jistik, di-al'o-jist"ik-al), a. Having the form of a dialogue.

Dialogistically (di-al'o-jistik-al-li), adv.
In the manner of dialogue.
Dialogize (di-al'o-jiz), v. i. [See DIALOGUE.]
To discourse in dialogue.

Dialogue (dí'a-log), n. [Fr. dialogue, from
Gr. dialogos, conversation, dialogue, from dia-
legomai, to dispute-dia, and legō, to speak.]
1. A conversation or conference between
two or more persons; particularly, a formal
conversation in theatrical performances,
also, an exercise in colleges and schools, in
which two or more persons carry on a dis-
course. 2. A written conversation, or a
composition in which two or more persons
are represented as conversing on some
topic; as, the Dialogues of Plato.
Dialoguet (di'a-log), v.i. To discourse to-
gether; to confer. Dost dialogue with thy
shadow?' Shak.

Dialogue (di'a-log), v. t. To express, as in dialogue; to put in the form of a dialogue. 'And dialogued for him what he would say.' Shak.

Dial-plate (dí'al-plāt), n. 1. The plate of a dial, on which the lines are drawn to show the hour or time of the day. -2. The face of a clock or watch, on which the time of the day is shown.-3. Any kind of index-plate. One of those Dial-wheel (di'al-whel), n. wheels placed between the dial and pillarplate of a watch.

Dial-work (di'al-werk), n. That portion of the motion of a watch between the dial and movement-plate.

Dialycarpous (di'a-li-kärp''us), a. [Gr dialyo, to separate, and karpos, fruit] In bot. a term applied to a plant whose fruit is composed of distinct separate carpels. Dialypetalæ (di'a-li-pet"a-le), n. pl. [Gr. dialyo, to separate, and petalon, a leaf. In bot. same as Polypetala (which see). Dialypetalous (di'a-li-pet"al-us), a. In bot. same as Polypetalous (which see). Dialyphyllous (di-al-if'il-lus), a. (Gr. dialys, to separate, and phyllon, a leaf.] Same as Dialysepalous.

Dialysepalous (di'a-li-sep'al-us), a. [Gr. dialyo, to separate, and L. L. sepalum, a leaf.] In bot. noting a flower with a calyx composed of separate sepals; polysepalous. Dialyse, Dialyze (di'a-liz), v.t. In chem. to separate by a dialyser, as substances capable of being so disengaged from a mixture; to diffuse by, or as by, the process called dialysis. See DIALYSIS. Dialyser, Dialyzer (di'a-liz-ér), n. The parchment paper, or septum, stretched over a wood or gutta-percha ring used in the operation of dialysis.

Dialysis (di-ali-sis), n. [Gr. dialysis, a loosing from anything, a separation; dialyo, to dissolve-dia, and lyo, to dissolve.] 1. A mark in writing or printing consisting of two points placed over one of two vowels,

DIALYTIC

to show that the two vowels are to be separated in pronunciation, as in aër: otherwise called Dieresis. -2 In rhet, asyndeten (which see).-3. In med. debility; also, a solution of continuity.-4. In chem the 4 or process of separating the crystallod elements of a body from the colloid. This is done by pouring a mixed solution of crystalloid and colloid on a sheet of parchment paper stretched over a wood or gutta-percha hoop, having its edges well drawn up, and confined by an outer rim. The parchment is allowed to float on a basin of water Diffusion immediately commences, the crystalloid passing through and dissolv. ing in the pure water beneath, whilst the colloid remains behind. Thus gruel or broth, containing a very little arsenic dissolved in it gives up the whole of its arsenic to the water, whilst scarcely a trace of the organic substance passes through. As almost all the poisons in common use, as arsenic, strychnine, corrosive sublimate, oxalic acid, acetate of lead, morphia, &c., are crystalloids, the toxologist is by this process furnished with a very easy mode for detecting their presence.

Dialytic (di-a-lit'ik), a. Pertaining to dialysis; unloosing; unbracing, as the fibres; relaxing

Diamagnetic (di'a-mag-net"ik), a. [Gr. dia, and magnes, a magnet.] Pertaining to or exhibiting the phenomena of diamagnetism; a term applied to a class of substances which, when under the influence of magnetism, and freely suspended, take a position at right angles to the magnetic meridian, that is, Jint east and west. From the experiments of Faraday it appears to be clearly established that all matter is subject to the magnetic force as universally as it is to the gravitating force, arranging itself into two great divisions, the paramagnetic and diamagnetic. Among the former are iron, nickel, cobalt, platinum, palladium, titanium, and a few other substances; and among the latter are bismuth, antimony, cadmium, copper, gold, lead, mercury, silver, tin, zinc, and most solid, liquid, and gaseous substances. When a paramagnetic substance is suspended freely between the poles of a powerful horseshoe magnet it points in a line from one pole to the other, which Faraday terms the arial line. On the other hand, when a diamagnetic substance is suspended in the same manner it is repelled alike by both poles, and assumes an equatorial direction, or a direction at right angles to the axial line.

Diamagnetic (di'a-mag-net''ik), n. A substance which, when magnetized and suspended freely, points east and west. See the adjective.

Diamagnetism (di-a-mag'net-izm), n. 1. That branch of magnetism which treats of diamagnetic phenomena and diamagnetic

tes.-2. The action or magnetic influence which causes a diamagnetic substance, when suspended freely between the poles of a powerful horse-shoe magnet, to assume an equatorial position, or to take a direction at right angles to the axial line. Diamantine (di'a-man-tin), a. Adaman

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Diameter (di-am'et-ér), n. [Gr. diametros— dia, and metron, measure.] 1. A right Line passing through the centre of a circle or other curvilinear figure, terminated by the circumference, and dividing the figure into two equal parts. Whenever any point of a figure is called a centre, any straight line drawn through the centre, and terminated by

opposite boundaries, is called a diameter. And any point which bisects all lines drawn tarough it from opposite boundaries is called a centre. Thus, the circle, the conic ctions, the parallelogram, the sphere, the cube, and the parallelopiped, all have centres, and by analogy diameters. Euclid uses the word diameter in the sense of diagonal -2 In arch. the measure across the Iwer part of the shaft of a column, which, being divided into sixty parts, forms a sale by which all the parts of the order are measured. The sixtieth part of the diameter is called a minute, and thirty minutes make a module -3 The length of a right line passing through the centre of any object from one side to the other; width; thickness;

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as, the diameter of a tree or of a stone or of the head.

Diametral (di-a-met'ral), a. (which see).

Diametrical

Diametral (di-a-metʼral), n. A diameter; a diagonal.

Diametrally (di-a-metʼral-li), adv. Diametrically.

Diametric, Diametrical (di-a-met'rik, di-a-met'rik-al), a. 1. Of or pertaining to a diameter. 2. Directly opposed; as far removed as possible, as at the two extremities of a diameter.

At all events he had exposed himself to reproach by diametrical opposition to the profession of his whole life. Macaulay. Diametrically (di-a-met'rik-al-li), adv. In a diametrical direction; directly; as, diametrically opposite. "Whose principles were diametrically opposed to his.' Macaulay. Diamond (di'a-mond), n. [Fr. diamant, O.E. diamonte, diamaunt, corrupted from adamant (which see). Compare also It. and Sp. diamante, G. diamant or demant.] 1. Adamant; steel, or some imaginary substance of extreme hardness or impenetrability.

Then zeal, whose substance is ethereal, arming in complete diamond, ascends his fiery chariot. Milton.

2. A mineral, gem, or precious stone, of the most valuable kind, remarkable for its hardness, as it scratches all other minerals. When pure, the diamond is usually clear and transparent, but it is sometimes coloured, the colours being white, yellow, blue, green, black, &c. In its rough state it is commonly in the form of a roundish pebble, or of octahedral crystals. It consists of pure carbon. When placed between the poles of a powerful battery it is completely burned to carbon dioxide.

When pure and transparent, diamonds are said to be of the first water, and as their transparency decreases they are classed as of the second and third water. The weight, and consequently the value, of diamonds is estimated in carats, one of which is equal to 4 diamond grains or 3174 grains troy, and the price of one diamond compared to that of another of equal colour, transparency, purity, form, &c., greatly increases with the weight. Thus, a diamond of 1 carat would bring about £21, while one of equal purity, form, &c., 2 carats in weight would bring about £80. Diamonds are valuable for many purposes. Their powder is the best for the lapidary and the gem engraver, and they are much used in the cutting of window and plate glass. They are also extensively used by copper-plate engravers as etching points, and by engineers for piercing rocks. (See DIAMOND-BORER.) One of the largest diamonds known is that belonging to the Rajah of Mattan, in Borneo, weighing 367 carats. One of the most

celebrated diamonds is the Koh-i-noor, now

belonging to the crown of Great Britain: it originally weighed, it is said, about 800 carats, but by subsequent recutting it has been reduced to 1033 carats. The Orlow diamond, belonging to the Emperor of Russia, weighs 195 carats; and the Pitt or Regent diamond, among the French crown jewels, 136. Diamonds are found in numerous localities in Hindustan, Malacca, Borneo, and other parts in the East. In America they occur in Brazil, North Carolina, and Georgia. They have also been found in Algeria, Australia, and latterly in large quantities in South Africa. Diamonds are cut into various forms, but chiefly into brilliants and rose diamonds or rosettes. The brilliant-cut best brings out the beauty of the stone, and is the most expensive and difficult; it has an upper or principal octagonal face, surrounded with many facets; the greater the number of facets, the more valuable the diamond. The rose-cut diamond has a flat base, above which are

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DIANATIC

be cut as rose diamonds are cut as tablediamonds. Fig. 1 is the diamond in its rough state; fig. 2 is the vertical, and fig. 3 the lateral appearance of a brilliant; fig. 4, the vertical, and fig. 5 the lateral appearance of a rose-cut diamond; in fig. 6 the flat portion a in a cut stone is called the table; the part abb, which projects from the setting, is the front, the part bbc, sunk in the setting, is the back or culasse, while the line bb is the girdle.-3. A very small printing letter.-4. A geometrical figure, otherwise called a rhombus.-.5 One of a set of playing cards marked with the figure or figures of a diamond.-6. A glazier's tool for cutting glass. Diamonds so used are uncut, and they are so mounted as to act upon the glass, not by an angle, but by a curvilinear edge of the crystal.-Black diamond, a term applied colloquially to coal.-Diamond edi

Diamond Fret.

tion, an edition of a work printed in diamond, or very small type.Diamond fret in arch. a species of moulding consisting of fillets intersecting each other, so as to form diamonds or rhombuses. Diamond (di'a-mond), a. Resembling a diamond; as, a diamond colour; consisting of diamonds; as, a diamond necklace; or set with a diamond or diamonds; as, a diamond Diamond-beetle (di'a-mond-bet-1), n. The ring. Entimus imperialis, a splendid coleopterous insect, belonging to the family Curculionidæ. It is very abundant in some parts of South America.

Diamond-borer, Diamond-drill (di'amond-bōr-ér, di'a-mond-dril), n. A metal bar or tube, armed at the boring extremity with one or more diamonds, by the abrasion caused by which, as it rapidly revolves, rocks, gems, &c., are speedily perforated. Large implements of this kind driven by steam-power are now used in mining, tunDiamonded (di'a-mond-ed), a. Having the nelling, &c. figure of an oblique-angled parallelogram, rhombus, or lozenge. 'Diamonded or streaked in the fashion of a lozenge.' Fuller. Diamond-mine (di'a-mond-min), n. A mine in which diamonds are found. See DIAMOND.

Diamond-shaped (di'a-mond-shapt), a. Shaped like a diamond; specifically, in bot. applied to leaves when approaching to a lozenge-shape, having those sides that are opposite equal, and the angles generally two obtuse and two acute.

Diamond-spar (di'a-mond-spär), n.

as Corundum.

Same

Diana (di-a'na or di-an'a), n. In myth. the Latin name of the goddess known to the Greeks by the name of Artemis, the daughter of Zeus or Jupiter and Leto or Latona.

Diana.-Antique statue in the Louvre.

and sister of Apollo. She was the virgin goddess of the chase, and also presided over health.

Dianatic + (di-a-nat'ik), a. [Gr. dianaō, to flow through.] Reasoning logically and

DIANDER

progressively from one subject to another. Scott.

Diander (di-an'dér), n. [Gr. di for dis, twice, and aner, andros, a male.] In bot. a plant having two stamens. Diandria (di-an'dri-a), n. pl. The second class in the Linnæan system, comprehending all genera with flowers having only two stamens, provided the stamens are neither united at their base, nor combined with the style and stigma, nor separated from the pistil.

Diandria.

Diandrian, Diandrous (di-an'dri-an, di-an'drus), a. In bot. having two stamens. Dianoetic (di'a-no-et"ik), a. [Gr. dianoētikos, from dia, and noeo, to revolve in the mind.] Capable of thought; thinking; intellectual; of or pertaining to the discursive faculty.

I would employ... dianoetic to denote the operation of the discursive, elaborative, or comparative faculty. Sir W. Hamilton.

Dianoialogy (di'a-noi-al"o-ji), n. [Gr. dianoia, thought, and logos, discourse.] That department of philosophy which treats of the dianoetic faculties. Sir W. Hamilton. Dianthus (di-an'thus), n. [Gr. dios, divine, and anthos, a flower.] The pink, a large genus of tufted herbs, nat. order Caryophyllace, with narrow grass-like leaves, and solitary or fascicled rose, purple, or white flowers. The calyx is tubular, and the five petals have long claws. Two hundred species have been described from Europe, temperate Asia, North America, and Africa. The garden pink is derived from D. Caryophyllus, and sweet-william is D. barbatus. Four species are natives of Britain: D. Armeria (the Deptford pink), D. prolifer, D. deltoides (the maiden pink), and D. caesius (the Cheddar pink).

Diapaset (di'a-paz), n. Same as diapason. A tuneful diapase of pleasures.' Spenser. Diapasmt (di'a-pazm), n. [Gr. diapasma, from diapasso, to sprinkle over.] A perfume consisting of the powder of aromatic herbs, sometimes made into little balls. B. Jonson.

Diapason (di-a-pa'zon), n. [Gr. diapason, the concord of the first of the musical scale with its eighth; the octave-a contr. for he dia pason chordon symphonia, the concord through the first and last (lit. through all) notes. Pason is the genit. pl. fem. of Gr. adjective pas, all] In music, (a) an old Greek term for the octave, or interval which includes all the tones of the diatonic scale.

Bacon.

The diapason or eight in musick is the sweetest concord; inasmuch as it is in effect an unison. (b) Proportion in the constituent parts of an octave; concord; harmony; thus, a note or instrument is said to be out of its diapason if it has not a correct relation with the other parts of the octave. In perfect diapason." Milton. (c) The entire compass of the tones of a voice or of an instrument. From harmony to harmony Through all the compass of the notes it ran, The diapason closing full in Man. Dryden. (d) A rule or scale by which the pipes of organs, the holes of flutes, &c., are adjusted, in due proportion for expressing the several tones and semitones. (e) One of certain stops in the organ, so called because they extend through the scales of the instrument. They are of several kinds, as open diapason, stopped diapason, double diapason, and the like.

Diapason-diapente (di-a-pa'zon-di-a-pen'tě), n. In music, a compound consonance in a triple ratio, as 3 to 9, consisting of 9 tones and a semitone, or 19 semitones; a twelfth.

Diapason-diatessaron (di-a-pa'zon-di-atess'a-ron), n. In music, a compound concord, founded on the proportion of 8 to 3, consisting of 8 tones and a semitone. Diapason-ditone (di-a-pa'zon-di'tōn), n. In music, a compound concord, whose terms are as 10 to 4, or 5 to 2.

Diapason-semiditone (di-a-pā'zon-se-midi'ton), n. In music, a compound concord, whose terms are in the proportion of 12 to 5. Diapensiaceae (di-a-pen'si-a"sé-e), n.pl. A nat. order of dicotyledonous plants, allied to the heaths, inhabiting the northern parts of Europe and America, consisting of prostrate small shrubs with pentamerous gamopetalous flowers, and three-celled erect capsules. The order contains six genera, each with one or two species. Diapente (di-a-pen'tě), n. [Gr. dia, and

24

pente, five.] 1. In music, a fifth; an interval making the second of the concords, and with the diatessaron, an octave. 2. In phar. a composition of five ingredients. Diaper (di'a-pèr), n. [Fr. diapré, pp. of diaprer, to variegate with different colours; LL. diasprus, a kind of precious cloth, from It. diaspro, jasper, a precious stone of various colours. See JASPER.] 1. A kind of textile fabric, formed of either linen or cotton, or a mixture of the two, upon the surface of which a figured pattern is produced by a peculiar mode of twilling. Diaper is much used for towels or napkins. Hence2. A towel or napkin.

Let one attend him with a silver basin,... Another bear the ewer, the third a diaper. Shak. 3. The flowering either of sculpture in low relief, or of painting or gilding used to ornament a panel or flat surface. 4. In her. same as Diapering (which see).5. A square piece of cloth for wrapping about the hips of a child. Diaper (di'aper), v.t.

To

Diaper, Westminster Abbey.

variegate or diversify, as cloth, with figures; to flower.

Down-droop'd, in many a floating fold,
Engarlanded and diaper'd

With inwrought flowers, a cloth of gold. Tennyson. Diaper (di'a-pèr), v. i. To draw flowers or figures, as upon cloth. If you diaper on folds.' Peacham.

Diapered, p. and a. Flowered. Diapering (di'a-per-ing), n. In her. the covering of the surface of a shield with ornament of some kind, independently of the bearing or of the colours. It was much used in the middle ages to give a richness to highly finished work. It is sometimes only painted, as in the example here given, but sometimes it is in low relief like the specimen of wall diaper given under DIAPER, n. Diaphane (di'a-fan), n. [Gr. dia, through, and phaino, to show.] 1. A woven silk stuff with transparent and colourless figures. 2. In anat. an investing, cortical membrane of a sac or cell.

Diapering.

Diaphaned (di'a-fand), a. Transparent. [Rare.]

Diaphaneity (di'a-fa-ne"i-ti), n. [Gr. diaphaneia, transparency, from diaphaino, to shine through dia, and phaino, to shine.] The power of transmitting light; transparency; pellucidness. The diaphaneity of the air. Boyle. [Rare.] Diaphanic, Diaphanous (di'a-fan"ik, diaf'an-us), a. [See DIAPHANEITY.] Having power to transmit rays of light, as glass; pellucid; transparent; clear.

Air is an element superior and lighter than water, through whose vast, open, subtle, diaphanic, or transparent body, the light afterwards created easily transpired. Raleigh. A crystal river Diaphanous, because it travels slowly. Wordsworth. Diaphanometer (di'a-fan-om"et-ér), n. [Gr. diaphanes, transparent, and metron, a measure.] An instrument for estimating the transparency of the air.

Diaphanoscope (di-a-fan'o-skop), n. [Gr. dia, through, phaino, to show, and skopeo, to see.] In photog. a dark box in which transparent positives are viewed, either with or without a lens. The positive should be placed as far from the eye as the equivalent focal length of the lens with which the negative was taken; and when a lens is used for viewing it, its focal length should be the

same.

Diaphanously (di-af'an-us-li), adv. Transparently.

Diaphonic, Diaphonical (di-a-fon'ik, di-afon'ik-al), a. [Gr. dia, and phoneō, to sound.] Diacoustic.

Diaphonics (di-a-fön'iks), n. The science or doctrine of refracted sounds; diacoustics (which see).

DIASTALTIC

Diaphoresis (di'a-fo-re" sis), n. [Gr. diaphoresis, perspiration, from diaphoreo, to carry through, to throw off (as fever) by perspiration-dia, and phoreo, to carry.] In med. a greater degree of perspiration than is natural, but less than in sweating. Diaphoretic, Diaphoretical (di'a-fo-retik, di'a-fo-ret"ik-al), a. [See DIAPHORESIS.] Having the power to increase perspiration. Diaphoretic (di'a-fo-ret"ik), n. A medicine which promotes perspiration; a sudorific. Diaphoretics differ from sudorifics; the former only increase the insensible perspiration, the latter excite the sensible discharge called sweat.

Diaphragm (di'a-fram), n. [Gr. diaphrag ma, a partition wall-dia, and phrasso, to break off, to defend.] 1. In anat. the midriff, a muscle separating the chest or thorax from the abdomen, or lower cavity of the body. A complete diaphragm is found only in mammalia.-2. A partition or dividing substance, commonly with an opening through it.-3. In optics, a circular ring used in optical instruments to cut off marginal portions of a beam of light, as at the focus of a telescope.-4. In conch. a straight calcareous plate which divides the cavity of certain shells into two parts.

Diaphragmatic (di'a-frag-mat"ik), a. Appertaining to the diaphragm. Diaphragmatitis (di-a-frag'ma-ti"tis), n. In med. inflammation of the diaphragm, or of its peritoneal coats.

Diaphysis (di-af'i-sis), n. [Gr. dia, through, and physis, growth.] In bot. an abnormal extension of the centre of a flower, or of an inflorescence.

Diaplastic (di-a-plas'tik), n. A medicine used in the treatment of fractured or dislocated limbs.

Diapophysical (di'a-po-fiz"ik-al), a. Of or pertaining to a diapophysis.

Diapophysis (di-a-po'fi-sis), n. [Gr. dia, through, and apophysis, outgrowth.] In anat. the dorsal or tubercular portion of the transverse process of a vertebra. Diaporesis (di'a-po-re'sis), n. [Gr. diaporesis, a doubting, from diaporeo, to doubt.] In rhet. doubt; hesitation; a figure in which the speaker seems to be in doubt which of two subjects he ought to begin with. Diarchy (di'ar-ki), n. [Gr. di for dis, twice, and archein, to be the first, to rule.] A form of government in which the supreme power is vested in two persons.

Diarial, Diarian (di-a'ri-al, di-a'ri-an), a. Pertaining to a diary or journal; daily. Diarist (di'a-rist), n. One who keeps a diary. Diarrhoea, Diarrhea (di-a-re'a), n. [Gr. diarrhoia, from diarrheo, to flow through-dia, and rheo, to flow.] A morbidly frequent evacuation of the intestines, generally owing to inflammation or irritation of the mucous membrane of the intestines, and commonly caused by errors in regimen, the use of food hurtful from its quantity or quality, &c. Diarrhoetic, Diarrhetic (di-a-ret'ik), a. Diarthrosis (di-ar-thro'sis), n. [Gr., from Producing diarrhoea or lax. diarthroo, to divide by joints dia, through, asunder, and arthroo, to fasten by a joint, from arthron, a joint.] In anat. the movable connection of bones, permitting them to revolve freely on each other in every direction, as in the shoulder joint. Diary (di'a-ri), n. [L. diarium, a daily allowance of food, a journal, from dies, a day.] An account of daily events or transactions; a journal; a register of daily occurrences or observations; a blank book dated for the record of daily memoranda; as, a diary of the weather.

In sea-voyages, where there is nothing to be seen but sky and sea, men make diaries; but in landtravel, wherein so much is to be observed, they omit Васом.

[graphic]

it.

Diary (di'a-ri), a. Lasting for one day; as, a diary fever. Diaschisma (di-a-skiz'ma), n. [Gr., a piece cut off, from diaschizo-dia, and schizo, to cut off.] In ancient music, the difference between the comma and enharmonic diesis, commonly called the lesser comma. Diaspore (di'a-spor), n. [Gr. diaspeiro, to disperse.] A mineral, consisting of hydrate of alumina, occurring in lamellar concretions, of a pearly gray colour. It is infusible, a small fragment, placed in the flame of a candle, or exposed to the flame of the blowpipe, almost instantly decrepitating and being dispersed; whence its name. Diastaltic (di-a-stalt'ik), a. (Gr. diastaltikos, dilating.] Dilated or extended: an epithet given by the Greeks to certain in

DIASTASE

tervals in music, as the major third, major sixth, and major seventh. Diastase (d'as-tas), n.

[See DIASTASIS.]

A substance existing in barley, oats, and potatoes, but only after germination, and so called because when in solution it possesses the property of causing fecula or starch to break up at the temperature of 150° Fahr, transforming it first into dextrine and then into sugar. It is obtained by digesting in a mixture of three parts of water and one of alcohol, at a temperature of 113" Fahr., a certain quantity of germinated barley ground and dried in the open air, and then putting the whole under pressure and filtering it. Diastase is solid, white, and soluble in water and diluted alcohol, but insoluble in strong alcohol.

Diastasis (di-as'ta-sis), n. [Gr. diastasis, a separation-dia, asunder, and sta, root of hustemi, to stand.] A forcible separation of bones without fracture.

Diastem (di'a-stem), n. [Gr. diastēma, dis

tance. See DIASTASIS.] In music, a simple

Interval.

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The other of the two sounds coincides with the diastole, and is spoken of as the second or the diastolic sound. Watson.

Diastyle (di'a-stil), n. [Gr. diastylion, the space between columns-dia, and stylos, a column.] In arch, that mode of arranging columns in which three diameters of the columns are allowed for intercolumniations. Diatessaron (di-a-tes'sa-ron), n. [Gr. dia, and tessara, four.] 1. In ancient music, a concord or harmonic interval, composed of a greater tone, a lesser tone, and one greater semitone. Its proportion is as four to three, and it is called a perfect fourth.-2. A harmony of the four Gospels; the four Gospels. Diathermal, Diathermanous (di-a-thérmal, di-a-ther'man-us), a. [Gr. dia, and thermainō, to heat.] Freely permeable by heat. The term is specifically applied to certain substances, such as transparent pieces of rock-salt, &c., which suffer radiant heat to pass through them, much in the same way as transparent or diaphanous bodies allow of the passage of light. Diathermancy, Diathermaneity (di-ather man-si, dî-a-ther'man-ē"i-ti), n. The property of transmitting radiant heat; the quality of being diathermal. Diathermanism (di-a-ther'man-izm), n. The doctrine or phenomena of the transmission of radiant heat. Diathermanous, a. See DIATHERMAL. Diathermic, Diathermous (di-a-thér mik, di-a-ther'mus), a. Diathermal. Diathesis (di-ath'e-sis), n. [Gr.] In med. particular disposition or habit of body, good or bad; predisposition to certain diseases rather than to others. Diatom (di'a-tom), n. Diatomacea (which see). Diatoma (di-at'ó-ma), n. [Gr. dia, through, and tome, a cutting.] In bot. a genus of

Diatoma.

A member of the

Diatomaces, of which the frustules are connected together by their angles, forming a zigzag chain.

Diatomaces (di′at-ô-mā”sē-ē), n. In bot. a natural order of confervoid algae, consisting of microscopic plants found in fresh, brackish, and salt water, and on moist plants and damp ground. The frond secretes a very large quantity of silex, which is formed in each cell into three portions, viz., two generally symmetrical valves and the connecting hoop. The valves are very various in forms, and covered with beautiful sculpturings, so as to form exquisite objects for

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the microscope. The species consist of single free cells, or the cells remain attached so as to form linear, flabelliform, circular, or geniculate fronds, or in some cases the cells or frustules are inclosed in a transparent gelatinous sheath or frond. The ordinary method of increase is by cell division. Reproduction by conjugation has been observed in several of the genera. Diatoma ceae are found fossil, forming considerable deposits of tertiary age, as at Bilin, Richmond in the United States, &c. Fossil polishing powders, as tripoli and berg-mehl, are composed of them. They are abundant in guano.

Diatomic (di-a-tom'ik), a. [Gr. di for dis, twice, and atomos, an atom (which see).] In chem. consisting of two atoms; as, a diatomic radicle.

They (alcohols) are divided into monatomic, diatomic, and triatomic alcohols, according as they are built upon the type of one, two, or three molecules of Rodwell.

water.

Diatomous (di-at'om-us), a.

[Gr. dia,

through, and tome, a cutting, from temno, to cleave.] In mineral, having crystals with one distinct diagonal cleavage. Diatonic (di-a-ton'ik), a. [Gr. dia, by or through, and tonos, sound.] 1. In Greek music, a term applied to one of the three genera of music, the other two being the chromatic and the enharmonic.-2. In modern music, applied to the major or minor scales, or to chords, intervals, and melodic progressions belonging to one key-scale. A diatonic chord is a chord having no note chromatically altered. A diatonic interval is an interval formed by two notes of the diatonic scale unaltered by accidentals. A diatonic melody is a melody composed of notes belonging to one scale only. A diatonic modulation is a transposition by which one key is changed into another closely related to it, as G is to C, D to A, and so on. Diatonically (di-a-ton'ik-al-li), adv. In a diatonic manner.

Diatribe (di'a-trib), n. [Gr. diatribe, a wearing away, a loss of time-dia, through, and tribo, to rub.] A continued discourse or disputation; a strain of invective; abuse; reviling. 'Her continued diatribe against intellectual people.' M. C. Clarke. Diatribist (di'a-trib-ist), n. One who prolongs his discourse or discussion; the author of a diatribe; one who makes diatribes. Diazeutic, Diazeuctic (di-a-zut'ik, di-azük'tik), a. [Gr. diazeugnumi, to disjoin dia, priv., and zeugnumi, to join.] Disjoining. Diazeutic tone, in ancient music, a tone which, like that from F to G in modern music, lay between two tetrachords. Dib (dib), v.i. In angling, to dip or dibble. Dib (dib), n. A dub; a pool. [Scotch.]

The dibs were full; the roads foul.

Galt.

Dib (dib), n. 1. A small bone in the knee of a sheep, uniting the bones above and below the joint. [Provincial.]-2. pl. A child's game, consisting in throwing up the small bones of the legs of sheep, or small stones, and catching them first on the palm and then on the back of the hand; in Scotland called Chuckies, and played with pebbles.-3. pl. A slang name for money; as, down with the dibs. Make nunky surrender his dibs.' Rejected Addresses.

Dib, Div (dib, div). [Hind., island.] The final element of many Hindu place-names; as, Serendib, Ceylon; Maldives; Laccadives. Dibber (dib'bér), n. [See DIBBLE.] A dibble; an agricultural instrument having dibbles or teeth for making holes in the ground.

Dibble (dib'bl), n. [Like dibber, from dib, a form of dip.] A pointed instrument used in gardening and agriculture to make holes for planting seeds, bulbs, &c. Dibble (dib'bl), v. t. pret. & pp. Dibble. dibbled; ppr. dibbling. To plant

with a dibble, or to make holes in for planting seeds, &c.; to make holes or indentations in, as if with a dibble.

The clayey soil around it was dibbled thick at the time by the tiny hoofs of sheep. H. Miller. Dibble (dib'bl), v.i. To dip, as in angling. This stone fly, then, we dape or dibble with, as with the drake. 1. Walton. Dibbler (dib'blêr), n. One who or that which makes holes in the ground to receive seed; a dibble.

Dibothrian (di-both'ri-an), n. [Gr. prefix di, and bothrion, a pit.] A member of a division of the Entozoa, including those tape-worms of the family Bothriocephala

DICHOTOMOUS

which have not more than two pits or fossa on the head. Dibranchiata (dī-brangk-i-ā'ta), n. pl. [Gr. prefix di, and branchia, gills.] An order of cephalopods in which the branchiæ are two in number, one situated on each side of the body. The group is divided into two tribes, the decapods and the octopods. Dibranchiate (di-brang'ki-āt), n. A member of the Dibranchiata. Dibranchiate (di-brangʻki-āt), a. Having two gills; as, the dibranchiate molluscs. Dibstone (dib'ston), n. A little stone or bone which children use in a certain game. See DIB.

Dicacioust (di-ka'shus), a. Talkative; saucy. Dicacity (di-kas'i-ti), n. [L. dicacitas, raillery, from dicax, dicacis, talkative, witty, from dico, to say.] Pertness. [Rare or obsolete.]

This gave a sort of petulant dicacity to his repartees. Graves.

Dicæology (di-sē-ol'o-ji), n. [Gr. dikaios, just, and logos, discourse.] In rhet. a figure of speech in which the orator attempts to move the audience in his favour. Dicarbonate (di-kar'bon-at), n. In chem. a term sometimes applied to a carbonate containing one atom of carbonic acid with two of the element with which it is comDicast (di'kast), n. pounded.

[Gr. dikastēs, from dikazo, to judge, from dikë, justice.] In Greek antiq. an officer answering nearly to the modern juryman.

Dicastery (di-kas'tér-i), n. In Greek antiq. a Dice (dis), n. pl. of die; also a game with court of justice in which dicasts used to sit. Dice (dis), v. i. To play with dice. dice. See DIE, a small cube.

I... diced not above seven times a week. Shak.

Dice (dis), v. t. pret. & pp. diced; ppr. dicing. 1. To sew a kind of waved pattern near the border of a garment.-2. To weave in or ornament with square or diamond-shaped figures.

A box from which Dice-box (dis'boks), n. dice are thrown in gaming. Dice-coal (dis'kōl), n. A species of coal easily splitting into cubical fragments. Dicephalous (di-sef'al-us), a. [Gr. prefix di, and kephale, head.] Having two heads on one body.

Dicer (dis'ér), n. A player at dice. 'As false as dicers' oaths.' Shak.

Dich (dik), v.. [Probably corrupted from d'it, for do it.] Do it; may it do. 'Much good dich thy good heart.' Shak. ['It has not been met with elsewhere, nor is it known to be provincial.' Nares.] Dichastasis (di-kas'ta-sis), n. [Gr., from dichazó, to disunite-dicha, in two, from dis.] Spontaneous subdivision. Dichastic (di-kast'ik), a. Capable of subdividing spontaneously. [Rare.] Diche, tv.t. To dig; to surround with a ditch.

Chaucer.

Dichlamydeous (di-kla-mid′ē-us), a. [Gr. prefix di, and chlamys, a garment.] In bot. Dichobune (di-ko-bun'), n. having two coverings, a calyx and a corolla. [Gr. dicha, divided in two, and bounos, a ridge.] A genus of extinct quadrupeds, occurring in the eocene formations, presenting marked affinity to the ruminants, and coming between them and the Anoplotherium. The name is derived from the deeply cleft ridges of the upper molars.

Dichodon (di'ko-don), n. [Gr. dicha, in two parts, and odous, odontos, a tooth. A genus of extinct quadrupeds, closely allied to the Dichobune, whose remains occur in the eocene of Hampshire: so called from the double crescent-shaped lines of enamel on the upper surface of their true molars. Dichogamous (di-kog'a-mus), a. In bot. exhibiting or characterized by dichogamy. Dichogamy (di-kogʻa-mi), n. [Gr. dicha, in two parts, and gamos, marriage.] In bot. a provision in hermaphrodite flowers to prevent self-fertilization, as where the stamens and pistils within the same flower are not matured at the same time. Dichotomist (di-kot'o-mist), n. One who dichotomizes, or divides things into pairs. Bacon. Dichotomize (di-kot'om-iz), v.t. [See DICHOTOMOUS.] To cut into two parts; to divide into pairs. Dichotomous (di-kot'om-us), a. [Gr. dicha, doubly, by pairs, and temno, to cut.] In bot. regularly dividing by pairs from top to bottom; as, a dichotomous stem. A good example of a dichotomous stem is furnished

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