| HELIOSCIOPHYTE | • HELIOSCIOPHYTE n. a plant that thrives in sun better than shade. |
| HETEROPHYLLIES | • HETEROPHYLLY n. the state of being heterophyllous. |
| HYDROCEPHALIES | • hydrocephalies n. Plural of hydrocephaly. • HYDROCEPHALY n. an accumulation of serous fluid within the cranial cavity, also HYDROCEPHALUS. |
| HYDROTHERAPIES | • hydrotherapies n. Plural of hydrotherapy. • HYDROTHERAPY n. therapy involving the use of water. |
| HYPERAESTHESIA | • hyperaesthesia n. Alternative spelling of hyperesthesia. • hyperæsthesia n. Obsolete form of hyperaesthesia. • HYPERAESTHESIA n. excessive sensitivity, also HYPERESTHESIA. |
| HYPERAESTHESIC | • HYPERAESTHESIC adj. excessively sensitive, also HYPERAESTHETIC. |
| HYPERAESTHETIC | • hyperaesthetic adj. Alternative form of hyperesthetic. • hyperæsthetic adj. Obsolete form of hyperesthetic. • HYPERAESTHETIC adj. excessively sensitive, also HYPERAESTHESIC. |
| HYPERESTHESIAS | • hyperesthesias n. Plural of hyperesthesia. • HYPERESTHESIA n. excessive sensitivity, also HYPERAESTHESIA. |
| HYPERSTHENITES | • hypersthenites n. Plural of hypersthenite. • HYPERSTHENITE n. a pyroxenite composed almost wholly of hypersthene. |
| HYPNOTHERAPIES | • hypnotherapies n. Plural of hypnotherapy. • HYPNOTHERAPY n. therapy involving the use of hypnotism. |
| PHENETHYLAMINE | • phenethylamine n. (Uncountable, organic chemistry) An aromatic amine which is a colorless liquid at room temperature. • phenethylamine n. (Countable, organic chemistry) Any of a group of compounds derived from that amine. • phenethylamine n. (Biochemistry) A monoamine neurotransmitter and neuromodulator found in the brain. |
| PHENYLEPHRINES | • phenylephrines n. Plural of phenylephrine. • PHENYLEPHRINE n. an agent used in the form of its hydrochloride as a vasoconstrictor. |
| PHENYLTHIOUREA | • phenylthiourea n. Phenylthiocarbamide. • PHENYLTHIOUREA n. a crystalline compound used to test for the presence of a certain dominant gene (the compound tasting bitter to those who possess the gene). |
| PHYTOTHERAPIES | • phytotherapies n. Plural of phytotherapy. • PHYTOTHERAPY n. the treatment of the diseases of plants. |