| PYRAMIDOLOGIES | • PYRAMIDOLOGY n. the study of the Egyptian pyramids. |
| PYRAMIDOLOGIST | • pyramidologist n. One who studies pyramidology, who studies pyramids from a supernatural viewpoint. • PYRAMIDOLOGIST n. a specialist in pyramidology. |
| PYRENOMYCETOUS | • PYRENOMYCETOUS adj. belonging to the Pyrenomycetes, a group of Ascomycetes whose characteristic fructification is the perithecium. |
| PYRHELIOMETERS | • pyrheliometers n. Plural of pyrheliometer. • PYRHELIOMETER n. an instrument for measuring the heating effect of the sun. |
| PYRHELIOMETRIC | • pyrheliometric adj. Relating to pyrheliometry. • PYRHELIOMETRIC adj. relating to measurement by pyrheliometer, an instrument for measuring the heating effect of the sun. |
| PYRIDOSTIGMINE | • pyridostigmine n. (Pharmacology) A parasympathomimetic and reversible cholinesterase inhibitor, used to treat muscle weakness… |
| PYRIMETHAMINES | • pyrimethamines n. Plural of pyrimethamine. • PYRIMETHAMINE n. a drug used in the treatment of malaria and toxoplasmosis. |
| PYROCHEMICALLY | • pyrochemically adv. In a pyrochemical way; by means of pyrochemistry. • PYROCHEMICAL adv. relating to chemical changes at high temperatures. |
| PYROGENICITIES | • pyrogenicities n. Plural of pyrogenicity. • PYROGENICITY n. the state of being pyrogenic. |
| PYROMETALLURGY | • pyrometallurgy n. Any process that uses high temperatures to transform either metals or their ores. • PYROMETALLURGY adj. chemical metallurgy depending on heat action (as roasting and smelting). |
| PYROMETRICALLY | • pyrometrically adv. By means of pyrometry. • PYROMETRICAL adv. relating to pyrometry, the art of measuring degrees of heat, or the expansion of bodies by heat, also PYROMETRIC. |
| PYRONINOPHILIC | • pyroninophilic adj. Readily stained by pyronine. • PYRONINOPHILIC adj. having an affinity for pyronine, any of several xanthene dyes. |
| 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. |
| PYROPHOTOMETER | • PYROPHOTOMETER n. a type of pyrometer in which the temperature of an incandescent body is determined by photometric measurement of the light it emits. |
| PYROPHOTOMETRY | • PYROPHOTOMETRY n. the measurement of the temperature of an incandescent body by photometric measurement of the light it emits. |
| PYROTECHNICIAN | • pyrotechnician n. A person who designs or organises pyrotechnics. • PYROTECHNICIAN n. one who makes fireworks. |