| HIPPOPOTAMUSES | • hippopotamuses n. Plural of hippopotamus. • HIPPOPOTAMUS n. a large African artiodactyl ungulate of aquatic habits. |
| HYPOPHOSPHATES | • hypophosphates n. Plural of hypophosphate. • HYPOPHOSPHATE n. any salt or ester of hypophosphoric acid. |
| HYPOPHOSPHITES | • hypophosphites n. Plural of hypophosphite. • HYPOPHOSPHITE n. a salt of hypophosphorous acid. |
| PHOSPHOLIPASES | • phospholipases n. Plural of phospholipase. • PHOSPHOLIPASE n. any of several enzymes that hydrolyze lecithins or phosphatidylethanolamines. |
| PHOSPHOROSCOPE | • phosphoroscope n. (Physics, chemistry) Any of several devices used to measure phosphorescence, and to distinguish it from fluorescence. • PHOSPHOROSCOPE n. an instrument for measuring the duration of phosphorescence after the source of radiation causing it has been removed. |
| PLEURAPOPHYSES | • pleurapophyses n. Plural of pleurapophysis. • PLEURAPOPHYSIS n. a lateral process of a vertebra, with the morphological character of a rib. |
| PLEURAPOPHYSIS | • pleurapophysis n. A process on a vertebra that is essentially a vertebral rib. • PLEURAPOPHYSIS n. a lateral process of a vertebra, with the morphological character of a rib. |
| POSTAPOCALYPSE | • postapocalypse n. The time after the apocalypse. • post-apocalypse n. Alternative spelling of postapocalypse. |
| PRECEPTORSHIPS | • preceptorships n. Plural of preceptorship. • PRECEPTORSHIP n. the office of preceptor. |
| PRESUPPOSITION | • presupposition n. An assumption made beforehand; a preliminary conjecture or speculation. • presupposition n. The act of presupposing. • presupposition n. (Linguistics) An assumption or belief implicit in an utterance or other use of language. |
| PYROPHOSPHATES | • pyrophosphates n. Plural of pyrophosphate. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
| SUPERPHOSPHATE | • superphosphate n. A fertilizer produced by the action of concentrated sulfuric acid on powdered phosphate rock. • superphosphate n. A phosphate containing the greatest amount of phosphoric acid that can combine with the base. • SUPERPHOSPHATE n. acid phosphate. |