| 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. |
| HYPOPHOSPHOROUS | • hypophosphorous adj. (Chemistry) Of or pertaining to hypophosphorous acid or its derivatives. • HYPOPHOSPHOROUS adj. as in hypophosphorous acid, a monobasic acid and a reducing agent. |
| PHOSPHOLIPASE | • phospholipase n. (Biochemistry) Any of several enzymes that hydrolyze the phosphate ester bonds of phospholipids. • PHOSPHOLIPASE n. any of several enzymes that hydrolyze lecithins or phosphatidylethanolamines. |
| PHOSPHOLIPASES | • phospholipases n. Plural of phospholipase. • PHOSPHOLIPASE n. any of several enzymes that hydrolyze lecithins or phosphatidylethanolamines. |
| PHOSPHOLIPIDS | • phospholipids n. Plural of phospholipid. • PHOSPHOLIPID n. a lipid which contains a phosphate group and also a nitrogenous group. |
| PHOSPHOPROTEINS | • phosphoproteins n. Plural of phosphoprotein. • PHOSPHOPROTEIN n. any of various proteins, such as casein, that contain combined phosphoric acid. |
| 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. |
| PHOSPHOROSCOPES | • phosphoroscopes n. Plural of phosphoroscope. • PHOSPHOROSCOPE n. an instrument for measuring the duration of phosphorescence after the source of radiation causing it has been removed. |
| PORPHYROPSINS | • porphyropsins n. Plural of porphyropsin. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
| PROPRIETORSHIPS | • proprietorships n. Plural of proprietorship. • PROPRIETORSHIP n. the office of proprietor. |
| PROSOPOGRAPHERS | • PROSOPOGRAPHER n. a writer of prosopographies, biographical sketches. |
| PROSOPOGRAPHIES | • prosopographies n. Plural of prosopography. • PROSOPOGRAPHY n. a biographical sketch; a description of person. |
| PSYCHOPOMPS | • psychopomps n. Plural of psychopomp. • PSYCHOPOMP n. a guide of souls, one who escorts the soul of a newly-deceased to the afterlife. |
| PYROPHOSPHATES | • pyrophosphates n. Plural of pyrophosphate. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |