| AXEROPHTHOLS | • AXEROPHTHOL n. vitamin A, a pale yellow crystalline substance, deficiency of which causes xerophthalmia. |
| EXHILARATORS | • exhilarators n. Plural of exhilarator. • EXHILARATOR n. one who exhilarates. |
| EXOSPHERICAL | • EXOSPHERICAL adj. related to the exosphere, the outermost layer of the earth's atmosphere, also EXOSPHERIC. |
| HETEROSEXUAL | • heterosexual adj. Sexually attracted to members of the opposite sex. • heterosexual n. A heterosexual person, or other heterosexual organism. • HETEROSEXUAL adj. attracted to the opposite sex. |
| HYDROXYLASES | • hydroxylases n. Plural of hydroxylase. • HYDROXYLASE n. any of a group of enzymes that catalyze oxidation reactions. |
| HYDROXYLATES | • hydroxylates v. Third-person singular simple present indicative form of hydroxylate. • HYDROXYLATE v. to introduce hydroxyl into. |
| LEXIGRAPHIES | • lexigraphies n. Plural of lexigraphy. • LEXIGRAPHY n. the art of the definition of words. |
| MORPHALLAXES | • morphallaxes n. Plural of morphallaxis. • MORPHALLAXIS n. regeneration in a changed form. |
| MORPHALLAXIS | • morphallaxis n. (Biology) The regeneration of specific tissue due to loss or death of the existing tissue. • MORPHALLAXIS n. regeneration in a changed form. |
| PYRRHULOXIAS | • pyrrhuloxias n. Plural of pyrrhuloxia. • PYRRHULOXIA n. a grey-and-pink crested bunting of Central and SW North America, with a short parrot-like bill. |
| SUPERHELIXES | • superhelixes n. Plural of superhelix. • SUPERHELIX n. a helix, as of DNA, which has its axis arranged in a helical coil. |
| TROPHALLAXES | • trophallaxes n. Plural of trophallaxis. • TROPHALLAXIS n. mutual exchange of nutriment in symbiosis. |
| TROPHALLAXIS | • trophallaxis n. (Biology) The mutual exchange of (fluid) food between individuals, especially in social insects. • TROPHALLAXIS n. mutual exchange of nutriment in symbiosis. |
| XIPHIPLASTRA | • xiphiplastra n. Plural of xiphiplastron. • XIPHIPLASTRON n. in chelonians, one of the plates forming the plastron, lying posterior to the hypoplastron. |
| XYLOGRAPHERS | • xylographers n. Plural of xylographer. • XYLOGRAPHER n. one who practises xylography, the art of making engravings on wood. |
| XYLOGRAPHIES | • xylographies n. Plural of xylography. • XYLOGRAPHY n. the art of making engravings on wood, esp. for printing. |