Pyr`o*ma"lic (?), a. [Pyro- + malic.] (Old Chem.) Pertaining to, or
designating, an acid now called maleic acid.
Pyr"o*man`cy (?), n. [Gr. &?;; &?; fire + &?; divination: cf. F.
pyromancie.] Divination by means of fire.
Pyr"o*ma"ni*a (?), n. [Pyro- + mania.] An insane disposition to
incendiarism.
Pyr"o*man"tic (?), a. Of or pertaining to pyromancy.
Pyr`o*man"tic, n. [Cf. Gr. &?;.] One who pretends to divine by fire.
Sir T. Herbert.
Py*rom"e*ter (?), n. [Pyro- + -meter: cf. F. pyromËtre.] 1. (Physics)
An instrument used for measuring the expansion of solid bodies by heat.
2. (Physics) An instrument for measuring degrees of heat above those
indicated by the mercurial thermometer.
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.
{ Pyr`o*met"ric (?), Pyr`o*met"ric*al } a. [Cf. F. pyromÈtrique.]
(Physics) Pertaining to, or obtained by, the pyrometer; as,
pyrometrical instruments; pyrometrical measurements.
Py*rom"e*try (?), n. The art of measuring degrees of heat, or the
expansion of bodies by heat.
Pyr`o*mor"phite (?), n. [G. pyromorphit, from Gr. &?; fire + &?; form.]
(Min.) 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.
Pyr`o*mor"phous (?), a. [Pyro- + -morphous.] (Min.) Having the property
of crystallizing by the agency of fire.
Pyr`o*mu"cate (?), n. (Chem.) A salt of pyromucic acid.
Pyr`o*mu"cic (?), a. [Pyro- + mucic.] (Chem.) 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.
Pyr`o*nom"ics (?), n. [Pyro- + Gr. &?; law.] The science of heat.
Pyr"ope (?), n. [L. pyropus a kind of red bronze, fr. Gr. &?;; &?; fire
+ &?; the eye, face: cf. F. pyrope.] (Min.) 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.
Pyr"o*phane (?), n. [See Pyrophanous.] (Min.) A mineral which is opaque
in its natural state, but is said to change its color and become
transparent by heat.
Py*roph"a*nous (?), a. [Pyro- + Gr. &?; to show, pass, to shine.]
Rendered transparent by heat.
Pyr"o*phone (?), n. [Pyro- + Gr. &?; sound.] A musical instrument in
which the tones are produced by flames of hydrogen, or illuminating
gas, burning in tubes of different sizes and lengths.
{ Pyr`o*phor"ic (?), Py*roph"o*rous (?), } a. [Pyro- + Gr. &?; to
bear.] Light- producing; of or pertaining to pyrophorus.
Pyrophoric iron (Chem.), finely reduced iron, which ignites
spontaneously on contact with air.
||Py*roph"o*rus (?), n. [NL. See Pyrophorous.] (Old Chem.) 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.
Pyr"o*phos"phate (?), n. (Chem.) A salt of pyrophosphoric acid.
Pyr`o*phos*phor"ic (?), a. [Pyro- + phosphoric.] (Chem.) Pertaining to,
or designating, an acid, H4P2O7, which is obtained as a white
crystalline substance. Its salts are obtained by heating the
phosphates.
Py*roph"yl*lite (?), n. [Pyro- + Gr. &?; leaf.] (Min.) A mineral,
usually of a white or greenish color and pearly luster, consisting
chiefly of the hydrous silicate of alumina.
Pyr"o*scope (?), n. [Pyro- + - scope: cf. F. pyroscope.] (Physics) 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. [R.]
<! p. 1170 !>
||Py*ro"sis (?), n. [NL., fr Gr. &?; a burning, an inflammation, fr.
||&?; to burn, fr. &?; fire.] (Med.) See Water brash, under Brash.
Py*ros"ma*lite (?), n. [Pyro- + Gr. &?; odor + -like. ] (Min.) 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.
Pyr"o*some (?), n. [Pyro- + - some body.] (Zoˆl.) 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.
Pyr`o*sul"phate (?), n. (Chem.) A salt of pyrosulphuric acid.
Pyr`o*sul*phu"ric (?), a. [Pyro- + -sulphuric.] (Chem.) 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.
Pyr`o*tar*tar"ic (?), a. [Pyro- + tartaric.] (Chem.) Pertaining to, or
designating, an acid obtained as a white crystalline substance by the
distillation of tartaric acid.
Pyr`o*tar"trate (?), n. (Chem.) A salt of pyrotartaric acid.
Pyr`o*tech"ni*an (?), n. A pyrotechnist.
{ Pyr`o*tech"nic (?), Pyr`o*tech"nic*al (?), } a. [Pyro- + technic,
technical: cf. F. pyrotechnique. See Fire, Technical.] Of or pertaining
to fireworks, or the art of forming them.
Pyrotechnical sponge. See under Sponge.
Pyr`o*tech*ni"cian (?), n. A pyrotechnist.
Pyr`o*tech"nics (?), n. The art of making fireworks; the manufacture
and use of fireworks; pyrotechny.
Pyr`o*tech"nist (?), n. One skilled in pyrotechny; one who manufactures
fireworks. Steevens.
Pyr`o*tech`ny (?), n. [Cf. F. pyrotechnie.] 1. The use and application
of fire in science and the arts. [Obs.] Sir M. Hale.