xanthemia n. excess carotene in the blood stream; can cause the skin to turn a pale yellow-red color
xanthoma n. a skin problem marked by the development (on the eyelids and neck and back) of irregular yellow nodules; sometimes attributable to disturbances of cholesterol metabolism
xanthomonad n. bacteria producing yellow non-water-soluble pigments; some pathogenic for plants
xanthophyl n. yellow carotenoid pigments in plants and animal fats and egg yolks
xanthophyll n. yellow carotenoid pigments in plants and animal fats and egg yolks
xanthosis n. an abnormal yellow discoloration of the skin
xebec n. a usually 3-masted Mediterranean sailing ship with long overhanging bow and stern
xenia n. the effect of the pollen on fruit tissues other than the embryo
xenogenesis n. the alternation of two or more different forms in the life cycle of a plant or animal
xenograft n. tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species
xenon n. a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
xenophobia n. a fear of foreigners or strangers
xenophobic adj. suffering from xenophobia; having abnormal fear or hatred of the strange or foreign
xenotime n. a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
xeranthemum n. any plant of the genus Xeranthemum native to southern Europe having chaffy or silvery flower heads with purplish tubular flowers
xeric adj. being deficient in moisture; deserts provide xeric environments
xerographic adj. of or relating to xerography
xerography n. an electrostatic printing process
xerophile n. plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte
xerophilous adj. tolerant of drought; xerophilous plants
xerophthalmia n. an eye disease resulting from severe lack of vitamin A -- xerophthalmic adj.
xerophyte n. plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte
xerophytic adj. adapted to a xeric (or dry) environment; cacti are xerophytic plants
xerox v. reproduce by xerography@n. a copy made by the xerox process; copies graphic matter by the action of light on an electrically charged photoconductive insulating surface in which the latent image is developed with a resinous powder
xi n. the 14th letter of the Greek alphabet
xylem n. the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
xylene n. a colorless flammable volatile liquid hydrocarbon used as a solvent
xylol n. a colorless flammable volatile liquid hydrocarbon used as a solvent
xylophone n. a percussion instrument with wooden bars tuned to produce a chromatic scale and with resonators; played with small mallets
xylophonist n. someone who plays a xylophone
xylose n. a sugar extracted from wood or straw; used in foods for diabetics
xylosma n. shrub or small tree grown as an ornamental in mild climates for its neat evergreen foliage and fragrant late flowers; native of China
