Pyroelectric (n.) A substance which becomes electrically polar when heated, exhibiting opposite charges of statical electricity at two separate parts, especially the two extremities.
Pyroelectricity (n.) Electricity developed by means of heat; the science which treats of electricity thus developed.
Pyrogallate (n.) A salt of pyrogallic acid; an ether of pyrogallol.
Pyrogallic (a.) Pertaining to, derived from, or designating, an acid called pyrogallol. See Pyrogallol.
Pyrogallol (n.) A phenol metameric with phloroglucin, obtained by the distillation of gallic acid as a poisonous white crystalline substance having acid properties, and hence called also pyrogallic acid. It is a strong reducer, and is used as a developer in photography and in the production of certain dyes.
Pyrogen (n.) Electricity.
Pyrogen (n.) A poison separable from decomposed meat infusions, and supposed to be formed from albuminous matter through the agency of bacteria.
Pyrogenic (a.) Producing heat; -- said of substances, as septic poisons, which elevate the temperature of the body and cause fever.
Pyrogenous (a.) Produced by fire; igneous.
Pyrognostic (a.) Of or pertaining to characters developed by the use of heat; pertaining to the characters of minerals when examined before the blowpipe; as, the pyrognostic characters of galena.
Pyrognostics (n. pl.) The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc.
Pyrography (n.) A process of printing, ornamenting, or carving, by burning with heated instruments.
Pyrolator (n.) A fire worshiper.
Pyrolatry (n.) The worship of fire.
Pyroligneous (a.) Alt. of Pyrolignic
Pyrolignic (a.) Pertaining to, or designating, the acid liquid obtained in the distillation of wood, consisting essentially of impure acetic acid.
Pyrolignous (a.) Same as Pyroligneous.
Pyrolithic (a.) Same as Pyrouric, or Cyanuric.
Pyrologist (n.) One who is versed in, or makes a study of, pyrology.
Pyrology (n.) That branch of physical science which treats of the properties, phenomena, or effects of heat; also, a treatise on heat.
Pyrolusite (n.) Manganese dioxide, a mineral of an iron-black or dark steel-gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name).
Pyromagnetic (a.) Acting by the agency of heat and magnetism; as, a pyromagnetic machine for producing electric currents.
Pyromalate (n.) A salt of pyromalic acid.
Pyromalic (a.) Pertaining to, or designating, an acid now called maleic acid.
Pyromancy (n.) Divination by means of fire.
Pyromania (n.) An insane disposition to incendiarism.
Pyromantic (a.) Of or pertaining to pyromancy.
Pyromantic (n.) One who pretends to divine by fire.
Pyrometer (n.) An instrument used for measuring the expansion of solid bodies by heat.
Pyrometer (n.) An instrument for measuring degrees of heat above those indicated by the mercurial thermometer.
Pyrometric (a.) Alt. of Pyrometrical
Pyrometrical (a.) Pertaining to, or obtained by, the pyrometer; as, pyrometrical instruments; pyrometrical measurements.
Pyrometry (n.) The art of measuring degrees of heat, or the expansion of bodies by heat.
Pyromorphite (n.) Native lead phosphate with lead chloride, occurring in bright green and brown hexagonal crystals and also massive; -- so called because a fused globule crystallizes in cooling.
Pyromorphous (a.) Having the property of crystallizing by the agency of fire.
Pyromucate (n.) A salt of pyromucic acid.
Pyromucic (a.) Pertaining to, derived from, or designating, an acid obtained as a white crystalline substance by the distillation of mucic acid, or by the oxidation of furfurol.
Pyronomics (n.) The science of heat.
Pyrope (n.) A variety of garnet, of a poppy or blood-red color, frequently with a tinge of orange. It is used as a gem. See the Note under Garnet.
Pyrophane (n.) A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat.
Pyrophanous (a.) Rendered transparent by heat.
Pyrophone (n.) A musical instrument in which the tones are produced by flames of hydrogen, or illuminating gas, burning in tubes of different sizes and lengths.
Pyrophoric (a.) Alt. of Pyrophorous
Pyrophorous (a.) Light-producing; of or pertaining to pyrophorus.
Pyrophorus (n.) Any one of several substances or mixtures which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.
Pyrophosphate (n.) A salt of pyrophosphoric acid.
Pyrophosphoric (a.) Pertaining to, or designating, an acid, H4P2O7, which is obtained as a white crystalline substance. Its salts are obtained by heating the phosphates.
Pyrophyllite (n.) A mineral, usually of a white or greenish color and pearly luster, consisting chiefly of the hydrous silicate of alumina.
Pyroscope (n.) An instrument for measuring the intensity of heat radiating from a fire, or the cooling influence of bodies. It is a differential thermometer, having one bulb coated with gold or silver leaf.
Pyrosis (n.) See Water brash, under Brash.
Pyrosmalite (n.) A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe.
Pyrosome (n.) Any compound ascidian of the genus Pyrosoma. The pyrosomes form large hollow cylinders, sometimes two or three feet long, which swim at the surface of the sea and are very phosphorescent.
Pyrosulphate (n.) A salt of pyrosulphuric acid.
Pyrosulphuric (a.) Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration.
Pyrotartaric (a.) Pertaining to, or designating, an acid obtained as a white crystalline substance by the distillation of tartaric acid.
Pyrotartrate (n.) A salt of pyrotartaric acid.
Pyrotechnian (n.) A pyrotechnist.
Pyrotechnic (a.) Alt. of Pyrotechnical
Pyrotechnical (a.) Of or pertaining to fireworks, or the art of forming them.
Pyrotechnician (n.) A pyrotechnist.
Pyrotechnics (n.) The art of making fireworks; the manufacture and use of fireworks; pyrotechny.
Pyrotechnist (n.) One skilled in pyrotechny; one who manufactures fireworks.
Pyrotechny (n.) The use and application of fire in science and the arts.
Pyrotechny (n.) Same as Pyrotechnics.
Pyrothonide (n.) A kind of empyreumatic oil produced by the combustion of textures of hemp, linen, or cotton in a copper vessel, -- formerly used as a remedial agent.
Pyrotic (a.) Caustic. See Caustic.
Pyrotic (n.) A caustic medicine.
Pyrotritartaric (a.) Designating an acid which is more commonly called uric acid.
Pyrotungstic (a.) Polytungstic. See Metatungstic.
Pyrouric (a.) Pertaining to, or designating, an acid now called cyanuric acid. See Cyanuric.
Pyrovanadic (a.) Pertaining to, or designating, an acid of vanadium, analogous to pyrophosphoric acid.
Pyroxanthin (n.) A yellow crystalline hydrocardon extracted from crude wood spirit; -- called also eblanin.
Pyroxene (n.) 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.
Pyroxenic (a.) Containing pyroxene; composed chiefly of pyroxene.
Pyroxenite (n.) A rock consisting essentially of pyroxene.
Pyroxylic (a.) Derived from wood by distillation; -- formerly used in designating crude wood spirit.
Pyroxylin (n.) 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.
Pyrrhic (a.) Of or pertaining to an ancient Greek martial dance.
Pyrrhic (a.) Of or pertaining to a pyrrhic, or to pyrrhics; containing pyrrhic; as, a pyrrhic verse.
Pyrrhic (n.) An ancient Greek martial dance, to the accompaniment of the flute, its time being very quick.
Pyrrhic (n.) A foot consisting of two short syllables.
Pyrrhicist (n.) One two danced the pyrrhic.
Pyrrhonean (a.) Alt. of Pyrrhonic
Pyrrhonic (a.) Of or pertaining to pyrrhonism.
Pyrrhonism (n.) Skepticism; universal doubt.
Pyrrhonist (n.) A follower of Pyrrho; a skeptic.
Pyrrhotine (n.) Alt. of Pyrrhotite
Pyrrhotite (n.) 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 (n.) 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 (n.) A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrol.
Pyrula (n.) A genus of large marine gastropods. having a pear-shaped shell. It includes the fig-shells. See Illust. in Appendix.
Pyruric (a.) Same as Pyrouric.
Pyrus (n.) A genus of rosaceous trees and shrubs having pomes for fruit. It includes the apple, crab apple, pear, chokeberry, sorb, and mountain ash.
Pyruvic (a.) Pertaining to, or designating, an acid (called also pyroracemic acid) obtained, as a liquid having a pungent odor, by the distillation of racemic acid.
Pyruvil (n.) A complex nitrogenous compound obtained by heating together pyruvic acid and urea.
Pythagorean (a.) Of or pertaining to Pythagoras (a Greek philosopher, born about 582 b. c.), or his philosophy.
Pythagorean (n.) A follower of Pythagoras; one of the school of philosophers founded by Pythagoras.
Pythagoreanism (n.) The doctrines of Pythagoras or the Pythagoreans.
Pythagoric (a.) Alt. of Pythagorical
Pythagorical (a.) See Pythagorean, a.