(||Xan"thi*um) n. [NL., fr. Gr. xa`nqion a plant used for dyeing the hair yellow, said to be the Xanthium strumarium, from xanqo`s yellow.] (Bot.) A genus of composite plants in which the scales of the involucre are united so as to form a kind of bur; cocklebur; clotbur.

(Xan"tho-) A combining form from Gr. xanqo`s yellow; as in xanthocobaltic salts. Used also adjectively in chemistry.

(Xan`tho*car"pous) a. [Xantho- + Gr. karpo`s fruit.] (Bot.) Having yellow fruit.

(||Xan*thoch"ro*i) n. pl. [NL. See Xanthochroic.] (Ethnol.) A division of the Caucasian races, comprising the lighter-colored members.

The Xanthochroi, or fair whites, . . . are the prevalent inhabitants of Northern Europe, and the type may be traced into North Africa, and eastward as far as Hindostan.

(Xan`tho*chro"ic) a. [Xantho- + Gr. chro`a color.] (Ethnol.) Having a yellowish or fair complexion; of or pertaining to the Xanthochroi.

(Xan`tho*don"tous) a. [Xantho- + Gr. 'odoy`s, 'odo`ntos, tooth.] Having yellow teeth.

(Xan"tho*gen) n. [Xantho- + -gen.] (Chem.) (a) The hypothetical radical supposed to be characteristic of xanthic acid. [Archaic] (b) Persulphocyanogen. [R.]

(Xan"tho*gen*ate) n. (Chem.) A salt of xanthic acid.

(Xan`tho*gen"ic) a. [See Xantho- , and -gen.] (Chem.) Producing a yellow color or compound; xanthic. See Xanthic acid, under Xanthic.

(||Xan*tho"ma) n. [NL. See Xantho-, and -oma.] (Med.) A skin disease marked by the development or irregular yellowish patches upon the skin, especially upon the eyelids; — called also xanthelasma.

(Xan"tho*phane) n. [Xantho- + Gr. fai`nein to show.] (Physiol.) The yellow pigment present in the inner segments of the retina in animals. See Chromophane.

(Xan"tho*phyll) n. [Xantho- + Gr. fy`llon leaf.] (Bot.) A yellow coloring matter found in yellow autumn leaves, and also produced artificially from chlorophyll; — formerly called also phylloxanthin.

(Xan"tho*pous) a. [Xantho- + Gr. poy`s, podo`s, foot.] (Bot.) Having a yellow stipe, or stem.

(Xan`tho*pro*te"ic) a. (Physiol. Chem.) Pertaining to, or derived from, xanthoprotein; showing the characters of xanthoprotein; as, xanthoproteic acid; the xanthoproteic reaction for albumin.

(Xan`tho*pro"te*in) n. [Xantho- + protein.] (Physiol. Chem.) A yellow acid substance formed by the action of hot nitric acid on albuminous or proteid matter. It is changed to a deep orange- yellow color by the addition of ammonia.

(Xan`tho*puc"cine) n. [Xantho- + puccoon + -ine.] (Chem.) One of three alkaloids found in the root of the yellow puccoon (Hydrastis Canadensis). It is a yellow crystalline substance, and resembles berberine.

(Xan`tho*rham"nin) n. [Xantho- + NL. Rhamnus, the generic name of the plant bearing Persian berries.] (Chem.) A glucoside extracted from Persian berries as a yellow crystalline powder, used as a dyestuff.

  By PanEris using Melati.

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