Diagraphics Di`aˇgraph"ics noun The art or science of descriptive drawing; especially, the art or science of drawing by mechanical appliances and mathematical rule.

Diaheliotropic Di`aˇhe`liˇoˇtrop"ic adjective [ Greek ... through, at variance + ... sun + ... turning.] (Botany) Relating or, or manifesting, diaheliotropism.

Diaheliotropism Di`aˇhe`liˇot"roˇpism noun (Botany) A tendency of leaves or other organs of plants to have their dorsal surface faced towards the rays of light.

Dial Di"al noun [ Late Latin dialis daily, from Latin dies day. See Deity .] 1. An instrument, formerly much used for showing the time of day from the shadow of a style or gnomon on a graduated arc or surface; esp., a sundial; but there are lunar and astral dials . The style or gnomon is usually parallel to the earth's axis, but the dial plate may be either horizontal or vertical.

2. The graduated face of a timepiece, on which the time of day is shown by pointers or hands.

3. A miner's compass.

Dial bird (Zoology) , an Indian bird ( Copsychus saularius ), allied to the European robin. The name is also given to other related species. -- Dial lock , a lock provided with one or more plates having numbers or letters upon them. These plates must be adjusted in a certain determined way before the lock can be operated. -- Dial plate , the plane or disk of a dial or timepiece on which lines and figures for indicating the time are placed.

Dial Di"al transitive verb [ imperfect & past participle Dialed or Dialled ; present participle & verbal noun Dialing or Dialling .] 1. To measure with a dial.

Hours of that true time which is dialed in heaven.

Talfourd.

2. (Mining) To survey with a dial. Raymond.

Dialect Di"aˇlect noun [ French dialecte , Latin dialectus , from Greek ..., from ... to converse, discourse. See Dialogue .] 1. Means or mode of expressing thoughts; language; tongue; form of speech.

This book is writ in such a dialect
As may the minds of listless men affect.
Bunyan .
The universal dialect of the world.

South.

2. The form of speech of a limited region or people, as distinguished from ether forms nearly related to it; a variety or subdivision of a language; speech characterized by local peculiarities or specific circumstances; as, the Ionic and Attic were dialects of Greece; the Yorkshire dialect ; the dialect of the learned.

In the midst of this Babel of dialects there suddenly appeared a standard English language.

Earle.

[ Charles V.] could address his subjects from every quarter in their native dialect .

Prescott.

Syn. -- Language; idiom; tongue; speech; phraseology. See Language , and Idiom .

Dialectal Di`aˇlec"tal adjective Relating to a dialect; dialectical; as, a dialectical variant.

Dialectic Di`aˇlec"tic noun Same as Dialectics .

Plato placed his dialectic above all sciences.

Liddell & Scott.

Dialectic, Dialectical Di`aˇlec"tic, Di`aˇlec"ticˇal adjective [ Latin dialecticus , Greek ...: confer French dialectique . See Dialect .] 1. Pertaining to dialectics; logical; argumental.

2. Pertaining to a dialect or to dialects. Earle.

Dialectically Di`aˇlec"ticˇalˇly adverb In a dialectical manner.

Dialectician Di`aˇlecˇti"cian noun [ Confer French dialecticien .] One versed in dialectics; a logician; a reasoner.

Dialectics Di`aˇlec"tics noun [ Latin dialectica (sc. ars ), Greek ... (sc. ...): confer French dialectique .] That branch of logic which teaches the rules and modes of reasoning; the application of logical principles to discursive reasoning; the science or art of discriminating truth from error; logical discussion.

» Dialectics was defined by Aristotle to be the method of arguing with probability on any given problem, and of defending a tenet without inconsistency. By Plato, it was used in the following senses: 1. Discussion by dialogue as a method of scientific investigation. 2. The method of investigating the truth by analysis. 3. The science of ideas or of the nature and laws of being -- higher metaphysics. By Kant, it was employed to signify the logic of appearances or illusions, whether these arise from accident or error, or from those necessary limitations which, according to this philosopher, originate in the constitution of the human intellect.

Dialectology Di`aˇlecˇtol"oˇgy noun [ Dialect + -logy .] That branch of philology which is devoted to the consideration of dialects. Beck.

Dialector Di`aˇlec"tor noun One skilled in dialectics.

Dialing Di"alˇing noun 1. The art of constructing dials; the science which treats of measuring time by dials. [ Written also dialling .]

2. A method of surveying, especially in mines, in which the bearings of the courses, or the angles which they make with each other, are determined by means of the circumferentor.

Dialist Di"alˇist noun A maker of dials; one skilled in dialing.

Diallage Diˇal"laˇge noun [ New Latin , from Greek ... interchange, change, from ... to interchange.] (Rhet.) A figure by which arguments are placed in various points of view, and then turned to one point. Smart.

Diallage Di"alˇlage noun [ Greek ... change, alluding to the change and inequality of luster between the natural joints of the mineral.] (Min.) A dark green or bronze-colored laminated variety of pyroxene, common in certain igneous rocks.

Diallel Di"alˇlel adjective [ Greek ... crossing.] Meeting and intersecting, as lines; not parallel; -- opposed to parallel . [ Obsolete] Ash.

Diallyl Diˇal"lyl noun (Chemistry) A volatile, pungent, liquid hydrocarbon, C ₆ H ₁₀ , consisting of two allyl radicals, and belonging to the acetylene series.

Dialogical Di`aˇlog"icˇal adjective [ Greek ... belonging to discourse.] Relating to a dialogue; dialogistical. Burton.

Dialogically Di`aˇlog"icˇalˇly adverb In the manner or nature of a dialogue. Goldsmith.

Dialogism Diˇal"oˇgism noun [ Greek ..., from ...: confer French dialogisme . See Dialogue .] An imaginary speech or discussion between two or more; dialogue. Fulke.

Dialogist Diˇal"oˇgist noun [ Latin dialogista : confer French dialogiste .] 1. A speaker in a dialogue.

2. A writer of dialogues. P. Skelton.

Dialogistic, Dialogistical Diˇal`oˇgis"tic, Diˇal`oˇgis"ticˇal adjective [ Greek ....] Pertaining to a dialogue; having the form or nature of a dialogue. -- Di*al`o*gis"tic*al*ly , adverb

Dialogite Diˇal"oˇgite noun [ From Greek ... an arguing.] (Min.) Native carbonate of manganese; rhodochrosite.

Dialogize Diˇal"oˇgize transitive verb [ Greek ...: confer French dialogiser .] To discourse in dialogue. Fotherby.

Dialogue Di"aˇlogue noun [ Middle English dialogue , Latin dialogus , from Greek ..., from ... to converse, dia` through + ... to speak: confer French dialogue . See Legend .] 1. A conversation between two or more persons; particularly, a formal conservation in theatrical performances or in scholastic exercises.

2. A written composition in which two or more persons are represented as conversing or reasoning on some topic; as, the Dialogues of Plato.

Dialogue Di"aˇlogue intransitive verb [ Confer French dialoguer .] To take part in a dialogue; to dialogize. [ R.] Shak.

Dialogue Di"aˇlogue transitive verb To express as in dialogue. [ R.]

And dialogued for him what he would say.

Shak.

Dialypetalous Di`alˇyˇpet"alˇous adjective [ Greek dia` through, asunder + ... to loose + ... leaf.] (Botany) Having separate petals; polypetalous.

Dialysis Diˇal"yˇsis noun ; plural Dialyses . [ Latin , separation, from Greek ..., from ... to part asunder, dissolve; dia` through + ... to loose.] 1. (Gram.) Dićresis. See Dićresis , 1.

2. (Rhet.) Same as Asyndeton .

3. (Medicine) (a) Debility. (b) A solution of continuity; division; separation of parts.

4. (Chemistry) The separation of different substances in solution, as crystalloids and colloids, by means of their unequal diffusion, especially through natural or artificial membranes.

Dialytic Di`aˇlyt"ic adjective [ Greek ..., from .... See Dialysis .] Having the quality of unloosing or separating. Clarke.

Dialytic telescope , an achromatic telescope in which the colored dispersion produced by a single object lens of crown glass is corrected by a smaller concave lens, or combination of lenses, of high dispersive power, placed at a distance in the narrower part of the converging cone of rays, usually near the middle of the tube.

Dialyzate Diˇal"yˇzate noun (Chemistry) The material subjected to dialysis.

Dialyzation Di`aˇlyˇza"tion noun (Chemistry) The act or process of dialysis.

Dialyze Di"aˇlyze transitive verb [ imperfect & past participle Dialyzed ; present participle & verbal noun Dialyzing .] (Chemistry) To separate, prepare, or obtain, by dialysis or osmose; to pass through an animal membrane; to subject to dialysis. [ Written also dialyse .]

Dialyzed Di"aˇlyzed adjective Prepared by diffusion through an animal membrane; as, dialyzed iron.

Dialyzer Di"aˇly`zer noun The instrument or medium used to effect chemical dialysis.

Diamagnet Di`aˇmag"net noun [ Prefix dia- + magnet .] A body having diamagnetic polarity.

Diamagnetic Di`aˇmagˇnet"ic adjective Pertaining to, or exhibiting the phenomena of, diamagnetism; taking, or being of a nature to take, a position at right angles to the lines of magnetic force. See Paramagnetic .

Diamagnetic attraction . See under Attraction .

Diamagnetic Di`aˇmagˇnet"ic noun Any substance, as bismuth, glass, phosphorous, etc., which in a field of magnetic force is differently affected from the ordinary magnetic bodies, as iron; that is, which tends to take a position at right angles to the lines of magnetic force, and is repelled by either pole of the magnet.

Diamagnetically Di`aˇmagˇnet"icˇalˇly adverb In the manner of, or according to, diamagnetism.

Diamagnetism Di`aˇmag"netˇism noun 1. The science which treats of diamagnetic phenomena, and of the properties of diamagnetic bodies.

2. That form or condition of magnetic action which characterizes diamagnetics.

Diamantiferous Di`aˇmanˇtif"erˇous adjective [ French diamant diamond + -ferous .] Yielding diamonds.

Diamantine Di`aˇman"tine adjective Adamantine. [ Obsolete]

Diameter Diˇam"eˇter noun [ French diamčtre , Latin diametros , from Greek ...; dia` through + ... measure. See Meter .] 1. (Geom.) (a) Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve. (b) A diametral plane.

2. The length of a straight line through the center of an object from side to side; width; thickness; as, the diameter of a tree or rock.

» In an elongated object the diameter is usually taken at right angles to the longer axis.

3. (Architecture) The distance through the lower part of the shaft of a column, used as a standard measure for all parts of the order. See Module .

Conjugate diameters . See under Conjugate .

Diametral Diˇam"eˇtral adjective [ Greek French diamétral .] Pertaining to a diameter; diametrical.

Diametral curve , Diametral surface (Geom.) , any line or surface which bisects a system of parallel chords drawn in a curve or surface. -- Diametral planes (Crystal.) , planes in which two of the axes lie.

Diametral Diˇam"eˇtral noun A diameter. [ Obsolete] Sir T. Browne.

Diametrally Diˇam"eˇtralˇly adverb Diametrically.

Diametric, Diametrical Diˇam"eˇtric, Diˇam"eˇtricˇal adjective 1. Of or pertaining to a diameter.

2. As remote as possible, as if at the opposite end of a diameter; directly adverse.

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