| HELIOTHERAPY | • heliotherapy n. Any medical therapy by exposure to light. • HELIOTHERAPY n. medical treatment by exposure to the sun's rays. |
| HETEROPHYLLY | • heterophylly n. (Botany) Marked changes in leaf morphology induced by environmental conditions; the ability to display such changes. • heterophylly n. (Botany) Significant variation in leaf shape on a same plant. • HETEROPHYLLY n. the state of being heterophyllous. |
| HETEROTHALLY | • heterothally n. Heterothallism. • HETEROTHALLY n. the state of being heterothallic, also HETEROTHALLISM. |
| HYDROPHILITE | • hydrophilite n. (Mineralogy) A soft white mineral formed from anhydrous calcium chloride. • HYDROPHILITE n. native calcium chloride. |
| HYDROTHERMAL | • hydrothermal adj. Of, or relating to hot water. • hydrothermal adj. (Geology) Of or relating to emanations of hot water that are rich in minerals, or to the rocks formed from them. • HYDROTHERMAL adj. designating naturally hot underground water that has geological effects. |
| HYPOCHLORITE | • hypochlorite n. (Chemistry) any salt of hypochlorous acid; used as a household bleach. • HYPOCHLORITE n. a salt of hypochlorous acid. |
| HYPOSULPHATE | • hyposulphate n. (Inorganic chemistry) Alternative form of hyposulfate. • HYPOSULPHATE n. a dithionate. |
| HYPOSULPHITE | • hyposulphite n. Alternative spelling of hyposulfite. • HYPOSULPHITE n. a salt of hyposulphurous acid. |
| HYPOTHETICAL | • hypothetical adj. Based upon a hypothesis; conjectural. • hypothetical adj. (Philosophy) conditional; contingent upon some hypothesis/antecedent. • hypothetical n. A possible or hypothetical situation or proposition. |
| ICHTHYOLITES | • ichthyolites n. Plural of ichthyolite. • ICHTHYOLITE n. a fossil fish. |
| METHOXYCHLOR | • methoxychlor n. (Organic chemistry) A synthetic organochlorine used as an insecticide. • METHOXYCHLOR n. a relatively nontoxic organochlorine insecticide. |
| METHYLPHENOL | • METHYLPHENOL n. a type of aromatic organic compound, aka cresol. |
| ORTHOCEPHALY | • orthocephaly n. The condition of being orthocephalic. • ORTHOCEPHALY n. the state of being orthocephalic. |
| THALLOPHYTES | • thallophytes n. Plural of thallophyte. • THALLOPHYTE n. any organism belonging to the Thallophyta, that includes algae, fungi, and bacteria. |
| THEOPHYLLINE | • theophylline n. (Organic chemistry, pharmacology) A bitter crystalline compound present in small quantities in tea leaves… • THEOPHYLLINE n. an isomer of theobromine found in tea, used in medicine. |