| 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. |
| PYROPHOSPHATE | • pyrophosphate n. (Inorganic chemistry) Any salt or ester of pyrophosphoric acid. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
| 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. |
| POSTAPOCALYPSE | • postapocalypse n. The time after the apocalypse. • post-apocalypse n. Alternative spelling of postapocalypse. |
| 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. |
| PYROPHOTOGRAPH | • PYROPHOTOGRAPH n. a burnt-in photograph, e.g. on glass or porcelain. |
| 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. |
| POSTAPOCALYPSES | • postapocalypses n. Plural of postapocalypse. • post-apocalypses n. Plural of post-apocalypse. |
| POSTAPOCALYPTIC | • postapocalyptic adj. Occurring after an apocalypse or catastrophic event. • post-apocalyptic adj. After the apocalypse. • post-apocalyptic adj. Of or pertaining to a fiction genre dealing with the collapse of society. |
| 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. |