PYRONOMICS
Pyr`o*nom"ics, n. Etym: [Pyro- + Gr.
Defn: The science of heat.
PYROPE
Pyr"ope, n. Etym: [L. pyropus a kind of red bronze, fr. Gr. pyrope.]
(Min.)
Defn: 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
Pyr"o*phane, n. Etym: [See Pyrophanous.] (Min.)
Defn: A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat.
PYROPHANOUS
Py*roph"a*nous, a. Etym: [Pyro- + Gr.
Defn: Rendered transparent by heat.
PYROPHONE
Pyr"o*phone, n. Etym: [Pyro- + Gr.
Defn: A musical instrument in which the tones are produced by flames of hydrogen, or illuminating gas, burning in tubes of different sizes and lengths.