PYROELECTRIC
Pyr`o*e*lec"tric, n. (Physics)
Defn: A substance which becomes electrically polar when heated, exhibiting opposite charges of statical electricity at two separate parts, especially the two extremities.
PYROELECTRICITY
Pyr`o*e`lec*tric"i*ty, n. (Physics)
Defn: Electricity developed by means of heat; the science which treats of electricity thus developed.
PYROGALLATE
Pyr`o*gal"late, n. (Chem.)
Defn: A salt of pyrogallic acid; an ether of pyrogallol.
PYROGALLIC
Pyr`o*gal"lic, a. Etym: [Pyro- + gallic.] (Chem.)
Defn: Pertaining to, derived from, or designating, an acid called pyrogallol. See Pyrogallol.
PYROGALLOL
Pyr`o*gal"lol, n. Etym: [Pyrogallic + -ol.] (Chem.)
Defn: 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.