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Pyritohedral
a.
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Like pyrites in hemihedral form.
Pyritohedron
n.
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The pentagonal dodecahedron, a common form of pyrite.
Pyritoid
n.
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Pyritohedron.
Pyritology
n.
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The science of blowpipe analysis.
Pyritous
a.
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Pyritic.
Pyro-
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Alt. of Pyr-
Pyr-
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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.
Pyro
n.
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Abbreviation of pyrogallic acid.
Pyroacetic
a.
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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.
Pyroacid
n.
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An acid obtained by sybjecting another acid to the action of heat. Cf. Pyro-.
Pyroantimonate
n.
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A salt of pyroantimonic acid.
Pyroantimonic
a.
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Pertaining to, or designating, an acid of antimony analogous to pyrophosphoric acid.
Pyroarsenate
n.
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A salt of pyroarsenic acid.
Pyroarsenic
a.
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Pertaining to or designating, an acid of arsenic analogous to pyrophosphoric acid.
Pyroborate
n.
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A salt of pyroboric acid.
Pyroboric
a.
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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.
Pyrocatechin
n.
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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.
Pyrochlore
n.
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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.
Pyrocitric
a.
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Pertaining to, or designating, any one of three acids obtained by the distillation of citric acid, and called respectively citraconic, itaconic, and mesaconic acid.
Purocoll
n.
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A yellow crystalline substance allied to pyrrol, obtained by the distillation of gelatin.
Pyroelectric
a.
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Pertaining to, or dependent on, pyroelectricity; receiving electric polarity when heated.
Pyroelectric
n.
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A substance which becomes electrically polar when heated, exhibiting opposite charges of statical electricity at two separate parts, especially the two extremities.
Pyroelectricity
n.
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Electricity developed by means of heat; the science which treats of electricity thus developed.
Pyrogallate
n.
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A salt of pyrogallic acid; an ether of pyrogallol.
Pyrogallic
a.
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Pertaining to, derived from, or designating, an acid called pyrogallol. See Pyrogallol.
Pyrogallol
n.
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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.
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Electricity.
Pyrogen
n.
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A poison separable from decomposed meat infusions, and supposed to be formed from albuminous matter through the agency of bacteria.
Pyrogenic
a.
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Producing heat; -- said of substances, as septic poisons, which elevate the temperature of the body and cause fever.
Pyrogenous
a.
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Produced by fire; igneous.