Webster's Dictionary, 1913

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Diazo- [ Prefix di- + azo- ] (Chemistry) A combining form (also used adjectively), meaning pertaining to , or derived from , a series of compounds containing a radical of two nitrogen atoms , united usually to an aromatic radical; as, diazo- benzene, C 6 H 5 .N 2 .OH.

» Diazo compounds are in general unstable, but are of great importance in recent organic chemistry. They are obtained by a partial reduction of the salts of certain amido compounds.

Diazo reactions (Chemistry) , a series of reactions whereby diazo compounds are employed in substitution. These reactions are of great importance in organic chemistry.

Diazotize transitive verb (Chemistry) To subject to such reactions or processes that diazo compounds, or their derivatives, shall be produced by chemical exchange or substitution.

Dib intransitive verb To dip. [ Prov. Eng.] Walton.

Dib noun
1. One of the small bones in the knee joints of sheep uniting the bones above and below the joints.

2. plural A child's game, played with dib bones.

Dibasic adjective [ Prefix di- + basic .] (Chemistry) Having two acid hydrogen atoms capable of replacement by basic atoms or radicals, in forming salts; bibasic; -- said of acids, as oxalic or sulphuric acids. Confer Diacid , Bibasic .

» In the case of certain acids dibasic and divalent are not synonymous; as, tartaric acid is tetravalent and dibasic , lactic acid is divalent but monobasic .

Dibasicity noun (Chemistry) The property or condition of being dibasic.

Dibber noun A dibble. Halliwell.

Dibble noun [ See Dibble , intransitive verb ] A pointed implement used to make holes in the ground in which no set out plants or to plant seeds.

Dibble intransitive verb [ imperfect & past participle Dibbled ; present participle & verbal noun Dibbling .] [ Freq. of Prov. English dib , for dip to thrust in. See Dip .] To dib or dip frequently, as in angling. Walton.

Dibble transitive verb
1. To plant with a dibble; to make holes in (soil) with a dibble, for planting.

2. 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.

Dibbler noun One who, or that which, dibbles, or makes holes in the ground for seed.

Dibranchiata noun plural [ New Latin , from Greek di- = di`s- twice + ... gills.] (Zoology) An order of cephalopods which includes those with two gills, an apparatus for emitting an inky fluid, and either eight or ten cephalic arms bearing suckers or hooks, as the octopi and squids. See Cephalopoda .

Dibranchiate adjective (Zoology) Having two gills. -- noun One of the Dibranchiata.

Dibs noun A sweet preparation or treacle of grape juice, much used in the East. Johnston.

Dibstone noun A pebble used in a child's game called dibstones . Locke.

Dibutyl noun [ Prefix di- + butyl .] (Chemistry) A liquid hydrocarbon, C 8 H 18 , of the marsh-gas series, being one of several octanes, and consisting of two butyl radicals. Confer Octane .

Dicacious adjective [ Latin dicax , dicacis , from dicere to say.] Talkative; pert; saucy. [ Obsolete]

Dicacity noun [ Latin dicacitas : confer French dicacité . See Dicacious .] Pertness; sauciness. [ Obsolete]

Dicalcic adjective [ Prefix di- + calcic .] (Chemistry) Having two atoms or equivalents of calcium to the molecule.

Dicarbonic adjective [ Prefix di- + carbonic .] (Chemistry) Containing two carbon residues, or two carboxyl or radicals; as, oxalic acid is a dicarbonic acid.

Dicast noun [ Greek ..., from ... to judge, ... right, judgment, justice.] A functionary in ancient Athens answering nearly to the modern juryman.

Dicastery noun [ Greek ..., from ... juryman. See Dicast .] A court of justice; judgment hall. [ R.] J. S. Mill.

Dice noun ; plural of Die . Small cubes used in gaming or in determining by chance; also, the game played with dice. See Die , noun

Dice coal , a kind of coal easily splitting into cubical fragments. Brande & C.

Dice intransitive verb [ imperfect & past participle Diced ; present participle & verbal noun Dicing .]
1. To play games with dice.

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

2. To ornament with squares, diamonds, or cubes.

Dicebox noun A box from which dice are thrown in gaming. Thackeray.

Dicentra noun [ New Latin , from Greek di- = di`s- twice + ... spur.] (Botany) A genus of herbaceous plants, with racemes of two-spurred or heart-shaped flowers, including the Dutchman's breeches, and the more showy Bleeding heart ( D. spectabilis ). [ Corruptly written dielytra .]

Dicephalous adjective [ Greek ...; di- = di`s- twice + ... head.] Having two heads on one body; double-headed.

Dicer noun A player at dice; a dice player; a gamester.

As false as dicers' oaths.

Dich intransitive verb To ditch. [ Obsolete]

Dichastic adjective [ Greek ... to part asunder, from ... in two, asunder, from di`s- twice.] (Biol.) Capable of subdividing spontaneously.

Dichlamydeous adjective [ Greek di- = di`s- twice + ..., ..., a cloak.] (Botany) Having two coverings, a calyx and in corolla.

Dichloride noun [ Prefix di- + chloride .] (Chemistry) Same as Bichloride .

Dichogamous adjective (Botany) Manifesting dichogamy.

Dichogamy noun [ Greek ... in two, asunder + ... marriage.] (Botany) The condition of certain species of plants, in which the stamens and pistil do not mature simultaneously, so that these plants can never fertilize themselves.

Dichotomist noun One who dichotomizes. Bacon.

Dichotomize transitive verb [ imperfect & past participle Dichotomized ; present participle & verbal noun Dichotomizing .] [ See Dichotomous .]
1. To cut into two parts; to part into two divisions; to divide into pairs; to bisect. [ R.]

The apostolical benediction dichotomizes all good things into grace and peace.
Bp. Hall.

2. (Astron.) To exhibit as a half disk. See Dichotomy , 3. "[ The moon] was dichotomized ." Whewell.

Dichotomize intransitive verb To separate into two parts; to branch dichotomously; to become dichotomous.

Dichotomous adjective [ Latin dichotomos , Greek ...; ... in two, asunder + diate`mnein to cut.] Regularly dividing by pairs from bottom to top; as, a dichotomous stem. -- Di*chot"o*mous*ly , adverb

Dichotomy noun [ Greek ..., from ...: confer French dichotomie . See Dichotomous .]
1. A cutting in two; a division.

A general breach or dichotomy with their church.
Sir T. Browne.

2. Division or distribution of genera into two species; division into two subordinate parts.

3. (Astron.) That phase of the moon in which it appears bisected, or shows only half its disk, as at the quadratures.

4. (Biol.) Successive division and subdivision, as of a stem of a plant or a vein of the body, into two parts as it proceeds from its origin; successive bifurcation.

5. The place where a stem or vein is forked.

6. (Logic) Division into two; especially, the division of a class into two subclasses opposed to each other by contradiction, as the division of the term man into white and not white .

Dichroic adjective [ See Dichroism .] Having the property of dichroism; as, a dichroic crystal.

Dichroiscope noun Same as Dichroscope .

Dichroism noun [ Greek ... two- colored; di- = di`s- twice + ... color.] (Opt.) The property of presenting different colors by transmitted light, when viewed in two different directions, the colors being unlike in the direction of unlike or unequal axes.

Dichroite noun [ See Dichroism .] (Min.) Iolite; -- so called from its presenting two different colors when viewed in two different directions. See Iolite .

Dichroitic adjective Dichroic.

Dichromate noun (Chemistry) A salt of chromic acid containing two equivalents of the acid radical to one of the base; -- called also bichromate .

Dichromatic adjective [ Prefix di- + chromatic : confer Greek ....]
1. Having or exhibiting two colors.

2. (Zoology) Having two color varieties, or two phases differing in color, independently of age or sex, as in certain birds and insects.

Dichromatism noun The state of being dichromatic.

Dichromic adjective [ Greek ... two- colored; di- = di`s- twice + ... color.] Furnishing or giving two colors; -- said of defective vision, in which all the compound colors are resolvable into two elements instead of three. Sir J. Herschel.

Dichroous adjective Dichroic.

Dichroscope noun [ Greek di- = di`s- twice + ... color + ... to view.] An instrument for examining the dichroism of crystals.