| HALOPHYTE | • halophyte n. (Botany) Any plant that tolerates an environment having a high salt content. • HALOPHYTE n. a plant found growing in salt marshes, or in the sea. |
| HELOPHYTE | • helophyte n. (Botany) Any plant (typically found in marshy ground) whose buds overwinter under water. • HELOPHYTE n. any perennial marsh plant that bears its overwintering buds in the mud below the surface. |
| HOLOPHOTE | • holophote n. A lighthouse lamp with lenses or reflectors to collect the rays of light and throw them in a given direction. • HOLOPHOTE n. an apparatus by which all the light from a lighthouse is thrown in the required direction. |
| HOLOPHYTE | • holophyte n. (Biology) Any organism that produces its own food through photosynthesis. • HOLOPHYTE n. a plant maintained entirely by its own organs. |
| HYLOPHYTE | • HYLOPHYTE n. a woodland plant. |
| HYPETHRAL | • hypethral adj. Alternative form of hypaethral. • HYPETHRAL adj. roofless; open to the sky (usually intentionally, so as to see the stars), also HUPAITHRIC, HYPAETHRAL, UPAITHRIC. |
| LIGHTSHIP | • lightship n. (Nautical) A vessel riding at anchor and displaying a light for the guidance of sailors, in a position… • light-ship n. Alternative spelling of lightship. • LIGHTSHIP n. a ship intended to function as a lighthouse. |
| NAPHTHOLS | • naphthols n. Plural of naphthol. • NAPHTHOL n. any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol, also NAPHTOL. |
| NAPHTHYLS | • naphthyls n. Plural of naphthyl. • NAPHTHYL n. a radical derived from naphthalene. |
| PHACOLITH | • phacolith n. (Geology) A lens-shaped mass that occurs in an anticlinal crest or synclinal trough. • PHACOLITH n. an intrusive mass of igneous rock situated between strata at the top of an anticline or the bottom of a syncline. |
| PHILOMATH | • philomath n. (Archaic) A lover of learning; a scholar. • philomath n. An astrologer or predictor. • PHILOMATH n. a lover of learning; a scholar. |
| PHOTOPHIL | • photophil n. The phase of a two-phase circadian rhythm associated with light and expenditure of energy. • PHOTOPHIL n. an organism that seeks the light. |
| PHTHALATE | • phthalate n. (Organic chemistry) Any salt or ester of a phthalic acid. • PHTHALATE n. a salt of phthalic acid. |
| PHTHALEIN | • phthalein n. (Organic chemistry) any of a range of lactones formed by the reaction of phenols with phthalic anhydride. • PHTHALEIN n. any one of a very important class of dye-yielding materials formed by the union of phenols with phthalic anhydride. |
| PHTHALINS | • phthalins n. Plural of phthalin. • PHTHALIN n. a colourless crystalline compound obtained by reducing a phthalein. |
| PHYTOLITH | • phytolith n. A small particle of silica or mineral that occurs in many plants. • PHYTOLITH n. a microscopic particle in plants. |
| TEPHILLAH | • tephillah n. Alternative form of tefilla. • TEPHILLAH n. (Hebrew) a phylactery worn by Jews, also TEFILLAH. |