| HIPPOPOTAMIAN | • hippopotamian adj. Resembling or characteristic of a hippopotamus. • HIPPOPOTAMIAN adj. like a hippopotamus, clumsy, also HIPPOPOTAMIC. |
| HYPOPHOSPHATE | • hypophosphate n. (Inorganic chemistry) The oxyanion of phosphorus P2O64- derived from hypophosphoric acid; any salt containing… • HYPOPHOSPHATE n. any salt or ester of hypophosphoric acid. |
| HYPOPHOSPHITE | • hypophosphite n. (Chemistry) any salt of hypophosphorous acid. • HYPOPHOSPHITE n. a salt of hypophosphorous acid. |
| 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. |
| PHOSPHOLIPIDS | • phospholipids n. Plural of phospholipid. • PHOSPHOLIPID n. a lipid which contains a phosphate group and also a nitrogenous group. |
| PHOTOSHOPPING | • photoshopping v. Present participle of photoshop. • PHOTOSHOP v. to manipulate a digital image using editing software. |
| PORPHYROPSINS | • porphyropsins n. Plural of porphyropsin. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
| PROPOXYPHENES | • propoxyphenes n. Plural of propoxyphene. • PROPOXYPHENE n. a narcotic analgesic structurally related to methadone but less addicting. |
| PROSOPOGRAPHY | • prosopography n. A study of the individuals in a group of people within a specific context and their relationships. • PROSOPOGRAPHY n. a biographical sketch; a description of person. |
| PYROPHOSPHATE | • pyrophosphate n. (Inorganic chemistry) Any salt or ester of pyrophosphoric acid. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |