| CHRYSOPHYTE | • chrysophyte n. Any golden alga of the class Chrysophyceae. • CHRYSOPHYTE n. a type of golden-brown alga. |
| HIEROGLYPHS | • hieroglyphs n. Plural of hieroglyph. • HIEROGLYPH n. a character used in a system of hieroglyphic writing, also HIEROGLYPHIC. |
| HYDROPHANES | • hydrophanes n. Plural of hydrophane. • HYDROPHANE n. a semitranslucent variety of opal that becomes translucent or transparent on immersion in water. |
| HYDROPHILES | • hydrophiles n. Plural of hydrophile. • HYDROPHILE n. a plant loving moist places, also HYGROPHILE. |
| HYDROPHONES | • hydrophones n. Plural of hydrophone. • HYDROPHONE n. an apparatus for listening to sounds conveyed by water. |
| HYDROPHYTES | • hydrophytes n. Plural of hydrophyte. • HYDROPHYTE n. an aquatic plant; an alga. |
| HYDROSPHERE | • hydrosphere n. All the liquid waters of the Earth, as distinguished from the land and the gases of the atmosphere. • HYDROSPHERE n. the water of the earth. |
| HYETOGRAPHS | • hyetographs n. Plural of hyetograph. • HYETOGRAPH n. an instrument for recording rainfall. |
| HYGROPHILES | • HYGROPHILE n. a plant loving moist places, also HYDROPHILE. |
| HYGROPHOBES | • HYGROPHOBE n. a plant growing best where moisture is scanty. |
| HYGROPHYTES | • hygrophytes n. Plural of hygrophyte. • HYGROPHYTE n. a plant adapted to a plentiful water-supply. |
| HYPAETHRONS | • HYPAETHRON n. an open court. |
| HYPOSTROPHE | • hypostrophe n. (Medicine) The act of a patient turning himself or herself. • hypostrophe n. (Medicine) A relapse, or return of a disease. • hypostrophe n. (Rhetoric) The use of insertion or parenthesis. |
| HYPSOCHROME | • hypsochrome adj. Hypsochromic. • HYPSOCHROME n. a shift to a shorter wavelength in the absorption spectrum of a compound. |
| ORTHOPHYRES | • ORTHOPHYRE n. a fine-grained syenitic rock with orthoclase crystals. |
| THEROPHYTES | • therophytes n. Plural of therophyte. • THEROPHYTE n. a plant that overwinters as a seed. |