| PYRAMIDICALLY | • pyramidically adv. In the form of a pyramid. • PYRAMIDICAL adv. of or like a pyramid, also PYRAMIDIC. |
| PYRETOTHERAPY | • pyretotherapy n. (Obsolete, medicine) pyrotherapy. • PYRETOTHERAPY n. medical treatment by causing fever. |
| PYRHELIOMETER | • pyrheliometer n. A device that measures the intensity of solar radiation received on the surface of the earth. • PYRHELIOMETER n. an instrument for measuring the heating effect of the sun. |
| PYRIDOXAMINES | • pyridoxamines n. Plural of pyridoxamine. • PYRIDOXAMINE n. a crystalline amine of the vitamin B6 group. |
| PYRIMETHAMINE | • pyrimethamine n. (Pharmacology) A synthetic compound derived from pyrimidine, acting as a folic acid antagonist and used… • PYRIMETHAMINE n. a drug used in the treatment of malaria and toxoplasmosis. |
| PYRITHIAMINES | • PYRITHIAMINE n. an antivitamin causing thiamine (vitamin B1) deficiency. |
| PYRITOHEDRONS | • pyritohedrons n. Plural of pyritohedron. • PYRITOHEDRON n. a pentagonal dodecahedron. |
| PYROBALLOGIES | • PYROBALLOGY n. the study of artillery. |
| PYROCATECHINS | • pyrocatechins n. Plural of pyrocatechin. • PYROCATECHIN n. another name for catechol, also PYROCATECHOL. |
| PYROCATECHOLS | • pyrocatechols n. Plural of pyrocatechol. • PYROCATECHOL n. another name for catechol, also PYROCATECHIN. |
| PYROELECTRICS | • pyroelectrics n. Plural of pyroelectric. • PYROELECTRIC n. a pyroelectric substance. |
| PYROLYTICALLY | • pyrolytically adv. By means of pyrolysis. • PYROLYTIC adv. relating to pyrolysis, decomposition due to heat. |
| PYROMORPHITES | • pyromorphites n. Plural of pyromorphite. • PYROMORPHITE n. a green, brown, or yellow lead ore. |
| PYROPHOSPHATE | • pyrophosphate n. (Inorganic chemistry) Any salt or ester of pyrophosphoric acid. • PYROPHOSPHATE n. a salt or ester of pyrophosphoric acid. |
| PYROPHYLLITES | • pyrophyllites n. Plural of pyrophyllite. • PYROPHYLLITE n. a silvery-white to pale-green aluminum silicate. |
| PYROSULPHATES | • pyrosulphates n. Plural of pyrosulphate. • PYROSULPHATE n. a salt of sulphur. |
| PYROSULPHURIC | • pyrosulphuric adj. (Britain) Alternative spelling of pyrosulfuric. • PYROSULPHURIC adj. as in pyrosulphuric acid, a type of acid. |
| PYROTARTRATES | • pyrotartrates n. Plural of pyrotartrate. • PYROTARTRATE n. a salt of tartaric acid. |
| PYROTECHNICAL | • pyrotechnical adj. Of or pertaining to pyrotechnics. • pyrotechnical adj. Resembling fireworks. • PYROTECHNICAL adj. relating to pyrotechnics, the art of making fireworks, also PYROTECHNIC. |
| PYROTECHNISTS | • pyrotechnists n. Plural of pyrotechnist. • PYROTECHNIST n. a firework maker. |