a. (Med.) Good against burns or pyrosis. -- n. Anything of use in preventing or healing burns or pyrosis. [ 1913 Webster ]

a. [ Gr. &unr_;; 'a priv. + &unr_; fire. ] Incombustible; capable of sustaining a strong heat without alteration of form or properties. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_;; &unr_; in + &unr_; to burn. ] A general fire; a conflagration. [ Obs. ] Sir M. Hale. [ 1913 Webster ]

n. [ Papyrus + -graph. ] An apparatus for multiplying writings, drawings, etc., in which a paper stencil, formed by writing or drawing with corrosive ink, is used. The word is also used of other means of multiplying copies of writings, drawings, etc. See Copygraph, Hectograph, Manifold. [ Obsolescent ] [ 1913 Webster +PJC ]

n. The process of multiplying copies of writings, etc., by means of the papyrograph. -- Pap`y*ro*graph"ic a. [1913 Webster]

{ }. [ Gr. &unr_;, &unr_;, fire. ] Combining forms designating fire or heat; specifically (Chem.), used to imply an actual or theoretical derivative by the action of heat; as in pyrophosphoric, pyrosulphuric, pyrotartaric, pyrotungstic, etc. [ 1913 Webster ]

n. (Photog.) Abbreviation of pyrogallic acid. [ Colloq. ] [ 1913 Webster ]

a. [ Pyro- + acetic: cf. F. pyroacétique. ] (Chem.) Pertaining to, and designating, a substance (acetone) obtained by the distillation of the acetates. It is now called also pyroacetic ether, and formerly was called pyroacetic spirit. [ 1913 Webster ]

n. [ Pyro- + acid. ] (Chem.) An acid obtained by sybjecting another acid to the action of heat. Cf. Pyro-. [ 1913 Webster ]

n. (Chem.) A salt of pyroantimonic acid. [ 1913 Webster ]

a. [ Pyro- + antimonic. ] (Chem.) Pertaining to, or designating, an acid of antimony analogous to pyrophosphoric acid. [ 1913 Webster ]

n. (Chem.) A salt of pyroarsenic acid. [ 1913 Webster ]

a. [ Pyro- + arsenic. ] (Chem.) Pertaining to or designating, an acid of arsenic analogous to pyrophosphoric acid. [ 1913 Webster ]

n. (Chem.) A salt of pyroboric acid. [ 1913 Webster ]

a. [ Pyro- + boric. ] (Chem.) Pertaining to derived from, or designating, an acid, H2B4O7 (called also tetraboric acid), which is the acid ingredient of ordinary borax, and is obtained by heating boric acid. [ 1913 Webster ]

n. [ Pyro- + catechu. ] (Chem.) A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; -- so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc. [ 1913 Webster ]

n. [ Pyro- + Gr. &unr_; pale green. ] (Min.) A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish color and resinous luster; -- so called from its becoming grass-green on being subjected to heat under the blowpipe. [ 1913 Webster ]

a. [ Pyro- + citric: cf. F. pyrocitrique. ] (Chem.) Pertaining to, or designating, any one of three acids obtained by the distillation of citric acid, and called respectively citraconic, itaconic, and mesaconic acid. [ 1913 Webster ]

n. [ Puro- + Gr. ko`lla glue. ] (Chem.) A yellow crystalline substance allied to pyrrol, obtained by the distillation of gelatin. [ 1913 Webster ]

a. [ Pyro- + electric. ] (Physics) Pertaining to, or dependent on, pyroelectricity; receiving electric polarity when heated. [ 1913 Webster ]

n. (Physics) A substance which becomes electrically polar when heated, exhibiting opposite charges of statical electricity at two separate parts, especially the two extremities. [ 1913 Webster ]

n. (Physics) Electricity developed by means of heat; the science which treats of electricity thus developed. [ 1913 Webster ]

n. (Chem.) A salt of pyrogallic acid; an ether of pyrogallol. [ 1913 Webster ]

a. [ Pyro- + gallic. ] (Chem.) Pertaining to, derived from, or designating, an acid called pyrogallol. See Pyrogallol. [ 1913 Webster ]

n. [ Pyrogallic + -ol. ] (Chem.) 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. [ 1913 Webster ]

n. [ See Pyrogenous. ] 1. Electricity. [ R. ] [ 1913 Webster ]

2. (Physiol. Chem.) A poison separable from decomposed meat infusions, and supposed to be formed from albuminous matter through the agency of bacteria. [ 1913 Webster ]

a. [ Pyro- + -gen + -ic. ] (Physiol.) Producing heat; -- said of substances, as septic poisons, which elevate the temperature of the body and cause fever. [ 1913 Webster ]

a. [ Gr. &unr_; fire + genous: cf. F. purogène, Gr. &unr_;. ] Produced by fire; igneous. Mantell. . [ 1913 Webster ]

a. [ Pyro- + Gr. &unr_; to know. ] (Min.) 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. [ 1913 Webster ]

n. pl. (Min.) The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc. [ 1913 Webster ]

n. A production of pyrography. [ Webster 1913 Suppl. ]

n. [ Pyro- + -graphy. ] A process of printing, ornamenting, or carving, by burning with heated instruments. One variant is wood burning. [ 1913 Webster +PJC ]

n. [ Pyro- + F. gravure engraving. ] Pyrography; also, a design or picture made by pyrography. [ Webster 1913 Suppl. ]

n. [ See Pyrolatry. ] A fire worshiper. [ R. ] Southey. [ 1913 Webster ]

n. [ Pyro- + Gr. &unr_; worship: cf. F. pyrolâtrie. ] The worship of fire. Young. [ 1913 Webster ]

{ } a. [ Pyro-+ L. lignum wood: cf. F. pyroligneux. ] (Old Chem.) Pertaining to, or designating, the acid liquid obtained in the distillation of wood, consisting essentially of impure acetic acid. [ 1913 Webster ]

n. A crude acetate produced by treating pyroligneous acid with a metal or basic compound; as, pyrolignite of iron (iron liquor). [ Webster 1913 Suppl. ]

a. Same as Pyroligneous. [ 1913 Webster ]

a. [ Pyro- + lithic. ] (Old Chem.) Same as Pyrouric, or Cyanuric. [ 1913 Webster ]

n. One who is versed in, or makes a study of, pyrology. [ 1913 Webster ]

n. [ Pyro- + -logy: cf. F. pyrologie. ] That branch of physical science which treats of the properties, phenomena, or effects of heat; also, a treatise on heat. [ 1913 Webster ]

n. [ Pyro- + Gr. &unr_; to loose, or &unr_; a loosing. ] (Min.) 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). [ 1913 Webster ]

a. [ Pyro- + magnetic. ] (Physics) Acting by the agency of heat and magnetism; as, a pyromagnetic machine for producing electric currents. [ 1913 Webster ]

n. (Chem.) A salt of pyromalic acid. [ Obs. ] [ 1913 Webster ]

a. [ Pyro- + malic. ] (Old Chem.) Pertaining to, or designating, an acid now called maleic acid. [ 1913 Webster ]

n. [ Gr. &unr_;; &unr_; fire + &unr_; divination: cf. F. pyromancie. ] Divination by means of fire. [ 1913 Webster ]

n. [ Pyro- + mania. ] An insane disposition to incendiarism. [ 1913 Webster ]

a. Of or pertaining to pyromancy. [ 1913 Webster ]

n. [ Cf. Gr. &unr_;. ] One who pretends to divine by fire. Sir T. Herbert. [ 1913 Webster ]

n. [ Pyro- + -meter: cf. F. pyromètre. ] 1. (Physics) An instrument used for measuring the expansion of solid bodies by heat. [ 1913 Webster ]

2. (Physics) An instrument for measuring degrees of heat above those indicated by the mercurial thermometer. [ 1913 Webster ]

☞ It is usually constructed so as to register the change which the heat to be measured produces in the length of some expansible substance, as a metallic rod, or in the intensity of a thermo-electric current. [ 1913 Webster ]