| BARYSPHERES | • baryspheres n. Plural of barysphere. • BARYSPHERE n. the area of earth underlying the lithosphere. |
| HETEROSPORY | • heterospory n. (Botany) The production of spores of two different sizes and sexes by the sporophytes of land plants. • HETEROSPORY n. the production of microspores and megaspores, as in seed plants. |
| HORSEPLAYER | • horseplayer n. (Gambling) A person who bets on horse races. • HORSEPLAYER n. one who habitually bets on horse races. |
| 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. |
| HYPERBOREAN | • hyperborean n. (Greek mythology) One of a race of people living in the extreme north, beyond the north wind. • hyperborean n. (Usually humorous) Any person living in a northern country, or to the north. • hyperborean adj. Pertaining to the extreme north of the earth, or (usually jocular) to a specific northern country or area. |
| HYPERCHARGE | • hypercharge n. (Physics) Short for hyperonic charge: a quantum characteristic of a group of subatomic particles governed… • HYPERCHARGE v. to charge excessively, to overload. |
| HYPERDRIVES | • hyperdrives n. Plural of hyperdrive. |
| HYPERMARKET | • hypermarket n. A combination of department store and supermarket. • HYPERMARKET n. a very large self-service store, also HYPERMART. |
| HYPERMETERS | • hypermeters n. Plural of hypermeter. • HYPERMETER n. a verse which has a redundant syllable or foot; a hypercatalectic verse. |
| HYPERMETRIC | • hypermetric adj. Having or relating to any syllables that are in a line beyond what the meter calls for. • hypermetric adj. Larger than normally measured. • HYPERMETRIC adj. above average height. |
| HYPERMILERS | • hypermilers n. Plural of hypermiler. |
| HYPERMODERN | • hypermodern adj. Extremely modern, bordering on the futuristic. • hypermodern adj. (Chess) Of or pertaining to hypermodernism. • HYPERMODERN adj. very modern. |
| HYPEROREXIA | • HYPEROREXIA n. compulsive overeating. |
| HYPERPOWERS | • hyperpowers n. Plural of hyperpower. • HYPERPOWER n. a state that is vastly stronger than any potential rival. |
| HYPERSTRESS | • hyperstress n. (Psychology) Excessive stress. • hyperstress n. (Physics) A four-dimensional equivalent of mechanical stress. • HYPERSTRESS n. excessive stress. |
| HYPERTHERMY | • HYPERTHERMY n. an extremely high fever, with a temperature of 41 degrees Centigrade or above, also HYPERPYREXIA. |
| KERATOPHYRE | • keratophyre n. (Petrography) A compact porphyritic rock composed of alkali-feldspars and diopside, and possibly including quartz. • KERATOPHYRE n. a fine-grained soda trachyte. |
| SEROTHERAPY | • serotherapy n. (Medicine) The therapeutic use of sera or vaccines. • SEROTHERAPY n. treatment with a serum or antitoxin. |