| HEXACHORDS | • hexachords n. Plural of hexachord. • HEXACHORD n. a series of six notes, with a semitone between the third and fourth, the other intervals being whole tones. |
| HEXAHEDRONS | • hexahedrons n. Plural of hexahedron. • HEXAHEDRON n. a solid body of six sides or faces. |
| AXEROPHTHOLS | • AXEROPHTHOL n. vitamin A, a pale yellow crystalline substance, deficiency of which causes xerophthalmia. |
| HEXAHEMERONS | • HEXAHEMERON n. the (biblical) six days of creation, also HEXAEMERON. |
| HEXACHLORIDES | • hexachlorides n. Plural of hexachloride. • HEXACHLORIDE n. a chloride containing six atoms of chlorine. |
| HIERACOSPHINX | • hieracosphinx n. A mythical beast found in Egyptian sculpture and European heraldry, being a lion with the head of a falcon. • HIERACOSPHINX n. in ancient Egyptian art, a hawk-headed sphinx. |
| HYDROTHORAXES | • hydrothoraxes n. Plural of hydrothorax. • HYDROTHORAX n. water liquid in the pleural cavity. |
| HYPOPHARYNXES | • hypopharynxes n. Plural of hypopharynx. • HYPOPHARYNX n. an appendage or thickened fold on the floor of the mouth of many insects that resembles a tongue. |
| THOROUGHWAXES | • THOROUGHWAX n. the plant hare's-ear, from the stem seeming to 'wax' (i.e. grow) through the leaves. |
| XANTHOCHROIAS | • XANTHOCHROIA n. yellowness of the skin. |
| XANTHOCHROIDS | • xanthochroids n. Plural of xanthochroid. • XANTHOCHROID n. a blond-haired and blue eyed person with fair white skin. |
| XANTHOCHROISM | • xanthochroism n. Alternative form of xanthochromism. • XANTHOCHROISM n. a condition in which all skin pigments except yellow disappear. |
| XANTHOCHROOUS | • xanthochroous adj. Yellow‐skinned; of or pertaining to Xanthochroi. • XANTHOCHROOUS adj. exhibiting xanthochroism, a condition in which all pigments other than yellow disappear, also XANTHOCHROIC. |
| XANTHOCHROISMS | • XANTHOCHROISM n. a condition in which all skin pigments except yellow disappear. |
| XANTHOCHROMIAS | • XANTHOCHROMIA n. any yellowish discoloration, esp. of the cerebrospinal fluid. |
| XEROPHTHALMIAS | • xerophthalmias n. Plural of xerophthalmia. • XEROPHTHALMIA n. extreme dryness of the conjunctive, thought to stem from a vitamin A deficiency, also XEROMA. |
| CEPHALOTHORAXES | • cephalothoraxes n. Plural of cephalothorax. • CEPHALOTHORAX n. the body, or head with thorax, of spiders, crustaceans, etc. |
| HIERACOSPHINXES | • hieracosphinxes n. Plural of hieracosphinx. • HIERACOSPHINX n. in ancient Egyptian art, a hawk-headed sphinx. |