| ETHNOHISTORY | • ethnohistory n. The history of an indigenous people. • ETHNOHISTORY n. a study of the development of cultures. |
| HEMERYTHRINS | • hemerythrins n. Plural of hemerythrin. • HEMERYTHRIN n. an iron-containing respiratory pigment in the blood of various chiefly marine invertebrates. |
| HETEROCHRONY | • heterochrony n. (Biology) the variation in ontogeny of individuals of a species that gives rise to evolution. • HETEROCHRONY n. divergence from normal time sequence in development, also HETEROCHRONISM. |
| 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. |
| HYPNOTHERAPY | • hypnotherapy n. Treatment of disease by means of hypnotism. • HYPNOTHERAPY n. therapy involving the use of hypnotism. |
| NYCHTHEMERAL | • nychthemeral adj. Lasting a nychthemeron (24 hours). • NYCHTHEMERAL adj. (Greek) of or relating to a nychthemeron or 24-hour period. |
| NYCHTHEMERON | • nychthemeron n. A period of one day and one night, a date: in the West, this is a period of 24 consecutive hours. • NYCHTHEMERON n. (Greek) a full period of a day and night. |
| PHANEROPHYTE | • phanerophyte n. (Biology) Any woody plant that carries its dormant buds openly on branches above the ground. • PHANEROPHYTE n. a perennial plant that bears its perennating buds well above the surface of the ground. |
| PHYTOHORMONE | • phytohormone n. A plant hormone. • PHYTOHORMONE n. a plant hormone, regulating growth. |
| TECHNOGRAPHY | • technography n. The description of the arts and crafts of tribes and peoples. • technography n. (Telecommunications) Live capture of meeting notes while projecting the real-time transcription to participants. • TECHNOGRAPHY n. the description of arts and crafts. |
| THIRTEENTHLY | • thirteenthly adv. In the thirteenth place; thirteenth in a row. • THIRTEENTH adv. number thirteen in sequence. |
| UNTHRIFTYHED | • UNTHRIFTYHED n. (Spenser) unthriftiness, also UNTHRIFTYHEAD. |