Words starting with X that are validated

• xenopus — Noun – English ～ an African clawed frog; in some classifications made the type genus of a separate family Xenopodidae
• Xenorhyncus — Noun – English ～ East Indian and Australian storks
• Xenorhyncus asiaticus — Noun – English ～ large mostly white Australian stork
• Xenosauridae — Noun – English ～ monotypic family of Mexican lizards
• Xenosaurus — Noun – English ～ type and sole genus of Xenosauridae: slender-bodied Mexican lizards having the upper surface covered with tiny granules and tubercles
• xenotime — Noun – English ～ a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
• xenotransplant — Noun – English ～ a surgical procedure in which tissue or whole organs are transfered from one species to another species
• xenotransplantation — Noun – English ～ a surgical procedure in which tissue or whole organs are transfered from one species to another species
• xeranthemum — Noun – English ～ any plant of the genus Xeranthemum native to southern Europe having chaffy or silvery flower heads with purplish tubular flowers
• Xeranthemum annuum — Noun – English ～ mostly widely cultivated species of everlasting flowers having usually purple flowers; southern Europe to Iran; naturalized elsewhere
• xeric — Adjective – English ～ being deficient in moisture; "deserts provide xeric environments"
• Xerobates — Noun – English ～ possible new genus for desert and Texas tortoises based on recent research
• xeroderma pigmentosum — Noun – English ～ a rare genetic condition characterized by an eruption of exposed skin occurring in childhood and photosensitivity with severe sunburn; inherited as a recessive autosomal trait in which DNA repair processes are defective so they are more likely to chromosome breaks and cancers when exposed to ultraviolet light
• xeroderma — Noun – English ～ a mild form of ichthyosis characterized by abnormal dryness and roughness of the skin
• xerodermia — Noun – English ～ a mild form of ichthyosis characterized by abnormal dryness and roughness of the skin
• xerographic copier — Noun – English ～ a duplicator (trade mark Xerox) that 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
• xerographic printer — Noun – English ～ a page printer that uses the xerographic process
• xerographic — Adjective – English ～ of or relating to xerography
• xerography — Noun – English ～ forming an image by the action of light on a specially coated charged plate; the latent image is developed with powders that adhere only to electrically charged areas; "edge enhancement is intrinsic in xerography"
• xeroma — Noun – English ～ abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A

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