PORPHYROPSIN | • porphyropsin n. Any of a group of purple carotenoid pigments, similar to rhodopsin, in the retinas of some fish. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
PROPOXYPHENE | • propoxyphene n. Dextropropoxyphene. • PROPOXYPHENE n. a narcotic analgesic structurally related to methadone but less addicting. |
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. |
HYPOPHOSPHORIC | • hypophosphoric adj. Of or pertaining to hypophosphoric acid or its derivatives. • HYPOPHOSPHORIC adj. as in hypophosphoric acid, a tetrabasic acid produced by the slow oxidation of phosphorus in moist ai. |
POLYPHOSPHORIC | • polyphosphoric adj. (Chemistry) Used to describe polymeric phosphoric acids and their derivatives. • POLYPHOSPHORIC adj. as in polyphosphoric acid, any oxyacid of pentavalent phosphorus. |
PROTOPORPHYRIN | • protoporphyrin n. (Biochemistry) Any porphyrin that lacks a central metal ion. • PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin. |
PYROPHOSPHATES | • pyrophosphates n. Plural of pyrophosphate. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
PYROPHOSPHORIC | • pyrophosphoric adj. Of, or relating to pyrophosphoric acid or its derivatives. • PYROPHOSPHORIC adj. as in pyrophosphoric acid, a type of acid. |
PYROPHOTOGRAPH | • PYROPHOTOGRAPH n. a burnt-in photograph, e.g. on glass or porcelain. |
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. |
PHOTOTOPOGRAPHY | • phototopography n. The surveying and mapping of a terrain based solely on terrestrial photographs. • PHOTOTOPOGRAPHY n. the preparation of topographic maps from photographs. |
PHOTOTYPOGRAPHY | • phototypography n. A photomechanical method of printing made to resemble traditional metal typography. • PHOTOTYPOGRAPHY n. any printing process involving the use of photography. |
PROTOPORPHYRINS | • protoporphyrins n. Plural of protoporphyrin. • PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin. |
PYROPHOTOGRAPHS | • PYROPHOTOGRAPH n. a burnt-in photograph, e.g. on glass or porcelain. |
PYROPHOTOGRAPHY | • pyrophotography n. (Photography) Any photographic process involving the use of heat to fix the picture. • PYROPHOTOGRAPHY n. the production of pyrophotographs. |