PYRRHONISM Pyr"rho*nism, n. Etym: [From Pyrrho, the founder of a school of skeptics in Greece (about 300 b. c.): cf. F. pyrrhonisme.]
Defn: Skepticism; universal doubt.
PYRRHONIST
Pyr"rho*nist, n.
Defn: A follower of Pyrrho; a skeptic.
PYRRHOTINE; PYRRHOTITE
Pyr"rho*tine, Pyr"rho*tite, n. Etym: [Gr. (Min.)
Defn: A bronze-colored mineral, of metallic luster. It is a sulphide of iron, and is remarkable for being attracted by the magnet. Called also magnetic pyrites.
PYRROL
Pyr"rol, n. Etym: [Gr. oleum oil.] (Chem.)
Defn: A nitrogenous base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless liquid, C4H5N, having on odor like that of chloroform. It is the nucleus and origin of a large number of derivatives. So called because it colors a splinter of wood moistened with hydrochloric acid a deep red.
PYRROLINE
Pyr"ro*line, n. (Chem.)
Defn: A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrol.