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  • English Word Pyrotic Definition A caustic medicine.
  • English Word Pyrotritartaric Definition Designating an acid which is more commonly called uric acid.
  • English Word Pyrotungstic Definition Polytungstic. See Metatungstic.
  • English Word Pyrouric Definition Pertaining to, or designating, an acid now called cyanuric acid. See Cyanuric.
  • English Word Pyrovanadic Definition Pertaining to, or designating, an acid of vanadium, analogous to pyrophosphoric acid.
  • English Word Pyroxanthin Definition A yellow crystalline hydrocardon extracted from crude wood spirit; -- called also eblanin.
  • English Word Pyroxene Definition A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90¡, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.
  • English Word Pyroxenic Definition Containing pyroxene; composed chiefly of pyroxene.
  • English Word Pyroxenite Definition A rock consisting essentially of pyroxene.
  • English Word Pyroxylic Definition Derived from wood by distillation; -- formerly used in designating crude wood spirit.
  • English Word Pyroxylin Definition A substance resembling gun cotton in composition and properties, but distinct in that it is more highly nitrified and is soluble in alcohol, ether, etc.; -- called also pyroxyle.
  • English Word Pyrrhic Definition Of or pertaining to an ancient Greek martial dance.
  • English Word Pyrrhic Definition Of or pertaining to a pyrrhic, or to pyrrhics; containing pyrrhic; as, a pyrrhic verse.
  • English Word Pyrrhic Definition An ancient Greek martial dance, to the accompaniment of the flute, its time being very quick.
  • English Word Pyrrhic Definition A foot consisting of two short syllables.
  • English Word Pyrrhicist Definition One two danced the pyrrhic.
  • English Word Pyrrhonean Definition Alt. of Pyrrhonic
  • English Word Pyrrhonic Definition Of or pertaining to pyrrhonism.
  • English Word Pyrrhonism Definition Skepticism; universal doubt.
  • English Word Pyrrhonist Definition A follower of Pyrrho; a skeptic.
  • English Word Pyrrhotine Definition Alt. of Pyrrhotite
  • English Word Pyrrhotite Definition 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.
  • English Word Pyrrol Definition 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.
  • English Word Pyrroline Definition A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrol.
  • English Word Pyrula Definition A genus of large marine gastropods. having a pear-shaped shell. It includes the fig-shells. See Illust. in Appendix.
  • English Word Pyruric Definition Same as Pyrouric.
  • English Word Pyrus Definition A genus of rosaceous trees and shrubs having pomes for fruit. It includes the apple, crab apple, pear, chokeberry, sorb, and mountain ash.
  • English Word Pyruvic Definition Pertaining to, or designating, an acid (called also pyroracemic acid) obtained, as a liquid having a pungent odor, by the distillation of racemic acid.
  • English Word Pyruvil Definition A complex nitrogenous compound obtained by heating together pyruvic acid and urea.
  • English Word Pythagorean Definition Of or pertaining to Pythagoras (a Greek philosopher, born about 582 b. c.), or his philosophy.