| HAEMOLYMPHS | • haemolymphs n. Plural of haemolymph. • HAEMOLYMPH n. the bloodlike fluid of invertebrates, also HEMOLYMPH. |
| HALOPHYTISM | • HALOPHYTISM n. the state of being a halophyte. |
| HELIOCHROMY | • heliochromy n. (Dated) The art of producing colour photographs. • HELIOCHROMY n. photography in natural colours. |
| HOLOPHYTISM | • holophytism n. (Biology) The property of being a holophyte. • HOLOPHYTISM n. the property of being holophytic, obtaining food by photosynthesis. |
| HOMOPHYLIES | • homophylies n. Plural of homophyly. • HOMOPHYLY n. resemblance due to common ancestry. |
| HOMOPHYLLIC | • HOMOPHYLLIC adj. exhibiting homophyly, resemblance due to common ancestry. |
| HYLOMORPHIC | • hylomorphic adj. Pertaining to hylomorphism. • HYLOMORPHIC adj. relating to a materialist conception of universe. |
| HYLOPATHISM | • hylopathism n. The doctrine that matter is sentient. • HYLOPATHISM n. belief in ability of matter to affect the spiritual world. |
| HYLOTHEISMS | • HYLOTHEISM n. the doctrine that there is no God but matter and the universe. |
| HYPOTHALAMI | • hypothalami n. Plural of hypothalamus. • HYPOTHALAMUS n. a part of the brain. |
| HYPOTHERMAL | • hypothermal adj. Involving extremely low temperatures. • hypothermal adj. (Geology) Formed or deposited under hypothermal conditions. • HYPOTHERMAL adj. of or relating to a hydrothermal metalliferous ore vein deposited at high temperature. |
| LITHOCHROMY | • LITHOCHROMY n. painting upon stone. |
| POLYRHYTHMS | • polyrhythms n. Plural of polyrhythm. • poly-rhythms n. Plural of poly-rhythm. • POLYRHYTHM n. the simultaneous combination of different rhythms in a piece of music. |