Xanthin, zan′thin, n. a name given to the yellow colouring matter of various flowers, to a principle in madder, and to a deposit of urine.—n. Xan′thate, a salt of xanthic acid.—adj. Xan′thic. [Gr. xanthos, yellow.]
Xanthium, zan′thi-um, n. a weedy plant of the aster family.—Also Cockle-bur, Clot-bur.
Xanthochroi, zan-thok′roi, n.pl. one of the five groups of men, according to Huxley and other ethnologists, comprising the fair whites.—n. Xanthochroi′a, a yellow discolouration of the skin.—adjs. Xanthochrō′ic, Xanthoch′rōous. [Formed through L. from Gr. xanthos, yellow, chroa, skin.]
Xanthoma, zan-thō′ma, n. a skin disease consisting of a growth of flat or tuberculated yellowish patches, often on the eyelids.—adj. Xanthoma′atous. [Gr. xanthos, yellow.]
Xanthomelanous, zan-thō-mel′a-nus, adj. applied to a type of men with black hair and yellow or olive skins. [Gr. xanthos, yellow, melas, -anos, black.]
Xanthophyll, zan′thō-fil, n. any one of certain yellow pigments contained in leaves.
Xanthopsy, zan′thop-si, n. a kind of colour-blindness in which everything looks yellowish.
Xanthosis, zan-thō′sis, n. the formation of a yellowish pigment in the areolar or muscular tissue, discolouring the skin—esp. in cancerous tumours.
Xanthous, zan′thus, adj. yellow. [Gr. xanthos, yellow.]
Xanthoxylum, zan-thok′si-lum, n. a genus of the Rutaceæ, comprising over one hundred species, of which many are found in Brazil and the West Indies—the Prickly Ash or Toothache-tree. [Formed from Gr. xanthos, yellow, xylon, wood.]