| HYPSOGRAPHIES | • HYPSOGRAPHY n. the branch of geography dealing with the measurement and mapping of heights above sea level. |
| PAPYROLOGISTS | • papyrologists n. Plural of papyrologist. • PAPYROLOGIST n. a student of papyrology. |
| PARAPSYCHOSES | • PARAPSYCHOSIS n. an abnormal psychosis. |
| PARAPSYCHOSIS | • PARAPSYCHOSIS n. an abnormal psychosis. |
| PERSPICUOUSLY | • perspicuously adv. With clarity and lucidity. • PERSPICUOUS adv. easily understood; clearly expressed. |
| PHOSPHORYLASE | • phosphorylase n. (Biochemistry) Any enzyme that catalyzes the production of glucose phosphate from glycogen and inorganic phosphate. • PHOSPHORYLASE n. any of the enzymes that catalyze phosphorolysis with the formation of organic phosphates. |
| PHYLLOSPHERES | • phyllospheres n. Plural of phyllosphere. • PHYLLOSPHERE n. the surface of a leaf considered as a habitat, esp. for microorganisms. |
| PITYROSPORUMS | • PITYROSPORUM n. a yeastlike fungus which can cause pityriasis. |
| POLYGRAPHISTS | • polygraphists n. Plural of polygraphist. • POLYGRAPHIST n. one who operates a polygraph. |
| POLYISOPRENES | • polyisoprenes n. Plural of polyisoprene. • POLYISOPRENE n. a rubberlike polymer of isoprene. |
| POLYMORPHISMS | • polymorphisms n. Plural of polymorphism. • POLYMORPHISM n. the circumstance in which two minerals with different crystalline structures have identical chemical compositions, e.g. diamond and graphite. |
| PORPHYROPSINS | • porphyropsins n. Plural of porphyropsin. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
| PSYCHOTROPICS | • psychotropics n. Plural of psychotropic. • PSYCHOTROPIC n. a drug acting on the mind. |
| PURPOSELESSLY | • purposelessly adv. In a purposeless manner; to no end; for no reason. • PURPOSELESS adv. having no purpose. |
| PYROSULPHATES | • pyrosulphates n. Plural of pyrosulphate. • PYROSULPHATE n. a salt of sulphur. |
| SAPROPHYTISMS | • SAPROPHYTISM n. being a saprophyte. |
| SPHYGMOGRAPHS | • sphygmographs n. Plural of sphygmograph. • SPHYGMOGRAPH n. an instrument for recording the pulse. |
| SUPERPOLYMERS | • superpolymers n. Plural of superpolymer. • SUPERPOLYMER n. a superior polymer. |
| TYPOGRAPHISTS | • typographists n. Plural of typographist. • TYPOGRAPHIST n. one who does typography. |