| XANTHOCHROISMS | • XANTHOCHROISM n. a condition in which all skin pigments except yellow disappear. |
| XANTHOCHROMIAS | • XANTHOCHROMIA n. any yellowish discoloration, esp. of the cerebrospinal fluid. |
| XANTHOMELANOUS | • xanthomelanous adj. (Anthropology, dated) Having yellow, brown, or olive skin and black hair. • XANTHOMELANOUS adj. applied by Huxley to members of the human race with black hair and yellow or olive skins. |
| XANTHOPHYLLOUS | • xanthophyllous adj. Of or relating to xanthophyll. • XANTHOPHYLLOUS adj. like a xanthophyll, a yellow carotenoid pigment found with chlorophyll in green plants and in egg yolks. |
| XANTHOPTERINES | • XANTHOPTERINE n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERIN. |
| XENODIAGNOSTIC | • xenodiagnostic adj. Of or pertaining to xenodiagnosis. • XENODIAGNOSTIC adj. relating to xenodiagnosis. |
| XENOPHOBICALLY | • xenophobically adv. In a xenophobic manner. • XENOPHOBIC adv. being afraid of foreigners. |
| XENOTRANSPLANT | • xenotransplant n. An instance of xenotransplantation. • xenotransplant n. The graft (tissue or organ) transplanted in such an instance: Synonym of xenograft. • xenotransplant v. To carry out xenotransplantation. |
| XEROPHTHALMIAS | • xerophthalmias n. Plural of xerophthalmia. • XEROPHTHALMIA n. extreme dryness of the conjunctive, thought to stem from a vitamin A deficiency, also XEROMA. |
| XEROPHYTICALLY | • xerophytically adv. As a xerophyte. • XEROPHYTIC adv. able to withstand drought. |
| XIPHIHUMERALIS | • xiphihumeralis n. A long, flat strip of pectoral muscle comprising a band of parallel fibres, found in felines. • XIPHIHUMERALIS n. in vertebrates, a muscle leading from the xiphoid cartilage to the humerus. |
| XIPHIPLASTRALS | • XIPHIPLASTRAL n. a type of chelonian. |
| XYLOPYROGRAPHY | • xylopyrography n. (Art) The art of burning pictures onto wood. • XYLOPYROGRAPHY n. engraving designs on wood with hot poker. |
| XYLOTYPOGRAPHY | • xylotypography n. Printing using the medium of wooden blocks. • XYLOTYPOGRAPHY n. printing from wooden type. |