| ALLOCHTHON | • allochthon n. (Geology) A geological formation not formed in the region where found and moved to its present location… |
| HALOTHANES | • halothanes n. Plural of halothane. • HALOTHANE n. an inhalation anaesthetic. |
| HELLHOUNDS | • hellhounds n. Plural of hellhound. • hell-hounds n. Plural of hell-hound. • hell␣hounds n. Plural of hell hound. |
| HEPTATHLON | • heptathlon n. (Athletics) An athletic contest comprising seven events; contested mostly by women, for whom this is an Olympic sport. • HEPTATHLON n. an athletic competition with seven events. |
| HEXATHLONS | • HEXATHLON n. an athletic contest comprising six events. |
| HOLOHEDRON | • holohedron n. A holohedral crystal. • HOLOHEDRON n. a geometrical form possessing the property of holohedrism. |
| HOOLACHANS | • HOOLACHAN n. (Gaelic) a Highland reel, esp. the reel of Tulloch, also HOOLICAN. |
| HYALOPHANE | • hyalophane n. (Mineralogy) A monoclinic crystalline mineral, a barium-rich potassium feldspar. • HYALOPHANE n. a species of the feldspar group containing barium. |
| LITHOPHANE | • lithophane n. A style of European porcelain in which the figures are seen by transmitted light. • Lithophane prop.n. A taxonomic genus within the family Noctuidae – certain moths. • LITHOPHANE n. porcelain with pictures showing through transparency. |
| RHINOLITHS | • rhinoliths n. Plural of rhinolith. • RHINOLITH n. a concretion formed within the cavities of the nose. |
| WITHHOLDEN | • withholden v. (Rare, archaic) past participle of withhold. • WITHHOLD v. to hold back. |
| XANTHOPHYL | • xanthophyl n. Dated form of xanthophyll. • XANTHOPHYL n. a yellow carotenoid pigment found with chlorophyll in green plants and in egg yolks, also XANTHOPHYLL. |