| BATHYSPHERES | • bathyspheres n. Plural of bathysphere. • BATHYSPHERE n. a submersible observation chamber. |
| CHRESTOMATHY | • chrestomathy n. A collection of written passages, used to learn an unfamiliar language. • chrestomathy n. A collection of choice passages from an author or authors. • CHRESTOMATHY n. a selection of passages compiled as an aid to learning a language; a volume of selected passages or stories of an author. |
| CHRYSOPHYTES | • chrysophytes n. Plural of chrysophyte. • CHRYSOPHYTE n. a type of golden-brown alga. |
| ETHNOHISTORY | • ethnohistory n. The history of an indigenous people. • ETHNOHISTORY n. a study of the development of cultures. |
| EURHYTHMISTS | • EURHYTHMIST n. a practitioner of eurhythmics, also EURYTHMIST. |
| HEMERYTHRINS | • hemerythrins n. Plural of hemerythrin. • HEMERYTHRIN n. an iron-containing respiratory pigment in the blood of various chiefly marine invertebrates. |
| HEMIHYDRATES | • hemihydrates n. Plural of hemihydrate. • HEMIHYDRATE n. a hydrate, such as plaster of paris, containing half a mole of water to one mole of the compound forming the hydrate. |
| HEXAHYDRATES | • hexahydrates n. Plural of hexahydrate. • HEXAHYDRATE n. a chemical compound with six molecules of water. |
| HYDROPATHIES | • hydropathies n. Plural of hydropathy. • HYDROPATHY n. the study of treating diseases with water. |
| HYPERSTHENES | • hypersthenes n. Plural of hypersthene. • HYPERSTHENE n. a rock-forming orthorhombic silicate of magnesium and ferrous iron. |
| HYPERSTHENIA | • hypersthenia n. (Pathology, archaic) A morbid condition marked by excessive excitement of all the vital phenomena. • HYPERSTHENIA n. a morbid condition marked by excessive excitement of all the vital phenomena. |
| HYPERSTHENIC | • hypersthenic adj. (Mineralogy) Composed of, or containing, hypersthene. • hypersthenic adj. Having or relating to hypersthenia. • hypersthenic n. A person who has hypersthenia. |
| HYPERTHYMIAS | • hyperthymias n. Plural of hyperthymia. • HYPERTHYMIA n. excessive emotionalism. |
| HYPOSTROPHES | • hypostrophes n. Plural of hypostrophe. • HYPOSTROPHE n. a return to the primary argument after digression. |
| HYPOTHERMIAS | • hypothermias n. Plural of hypothermia. • HYPOTHERMIA n. subnormal temperature of the body. |
| HYPOTHESISER | • hypothesiser n. Alternative form of hypothesizer. • HYPOTHESISER n. one who hypothesises, also HYPOTHESIZER. |
| HYPOTHESIZER | • hypothesizer n. A person who hypothesizes. • hypothesizer n. (Computing) Any of several systems that attempt to make educated guesses from incomplete information. • HYPOTHESIZER n. one who hypothesizes, also HYPOTHESISER. |
| PHYTOCHROMES | • phytochromes n. Plural of phytochrome. • PHYTOCHROME n. a plant pigment which absorbs red or infrared rays and acts as an enzyme controlling growth. |