Pyr`o*a*ce"tic (?), a. [Pyro- + acetic: cf. F. pyroacÈtique.] (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.
Pyr`o*ac"id (?), n. [Pyro- + acid.] (Chem.) An acid obtained by
sybjecting another acid to the action of heat. Cf. Pyro-.
Pyr`o*an`ti*mo"nate (?), n. (Chem.) A salt of pyroantimonic acid.
Pyr`o*an`ti*mon"ic (?), a. [Pyro- + antimonic.] (Chem.) Pertaining to,
or designating, an acid of antimony analogous to pyrophosphoric acid.
Pyr`o*ar"se*nate (?), n. (Chem.) A salt of pyroarsenic acid.
Pyr`o*ar*sen"ic (?), a. [Pyro- + arsenic.] (Chem.) Pertaining to or
designating, an acid of arsenic analogous to pyrophosphoric acid.
Pyr`o*bo"rate (?), n. (Chem.) A salt of pyroboric acid.
Pyr`o*bo"ric (?), 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.
Pyr`o*cat"e*chin (?), 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.
Pyr"o*chlore (?), n. [Pyro- + Gr. &?; 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.
Pyr`o*cit"ric (?), 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.
Pyr"o*coll (pr"*kl), n. [Puro- + Gr. ko`lla glue.] (Chem.) A yellow
crystalline substance allied to pyrrol, obtained by the distillation of
gelatin.
Pyr`o*e*lec"tric (?), a. [Pyro- + electric.] (Physics) Pertaining to,
or dependent on, pyroelectricity; receiving electric polarity when
heated.
Pyr`o*e*lec"tric, n. (Physics) A substance which becomes electrically
polar when heated, exhibiting opposite charges of statical electricity
at two separate parts, especially the two extremities.
Pyr`o*e`lec*tric"i*ty (?), n. (Physics) Electricity developed by means
of heat; the science which treats of electricity thus developed.
Pyr`o*gal"late (?), n. (Chem.) A salt of pyrogallic acid; an ether of
pyrogallol.
Pyr`o*gal"lic (?), a. [Pyro- + gallic.] (Chem.) Pertaining to, derived
from, or designating, an acid called pyrogallol. See Pyrogallol.
Pyr`o*gal"lol (?), 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.