| pyroacid | <chemistry> An acid obtained by sybjecting another acid to the action of heat. Cf. Pyro-. Origin: Pyro- + acid. Source: Websters Dictionary (01 Mar 1998) |
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| pyroantimonate | <chemistry> A salt of pyroantimonic acid. Source: Websters Dictionary (01 Mar 1998) |
| pyroantimonic | <chemistry> Pertaining to, or designating, an acid of antimony analogous to pyrophosphoric acid. Origin: Pyro- + antimonic. Source: Websters Dictionary (01 Mar 1998) |
| pyroarsenate | <chemistry> A salt of pyroarsenic acid. Source: Websters Dictionary (01 Mar 1998) |
| pyroarsenic | <chemistry> Pertaining to or designating, an acid of arsenic analogous to pyrophosphoric acid. Origin: Pyro- + arsenic. Source: Websters Dictionary (01 Mar 1998) |
| pyroborate | <chemistry> A salt of pyroboric acid. Source: Websters Dictionary (01 Mar 1998) |
| pyroboric | <chemistry> 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. Origin: Pyro- + boric. Source: Websters Dictionary (01 Mar 1998) |
| pyroboric acid | Perboric or pyroboric acid. Synonym: pyroboric acid. (05 Mar 2000) |
| pyrocalciferol | 10a-Ergosta-5,7,22-trien-3b-ol; 9-alpha-lumisterol;a thermal decomposition product of calciferol. (05 Mar 2000) |
| pyrocatechase | <enzyme> Little activity towards chlorinated substrates Registry number: EC 1.13.11.1 Synonym: pyrocatechase, catechol-1,2-oxygenase, pyrocatechol 1,2-dioxygenase (26 Jun 1999) |
| pyrocatechin | <chemistry> 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. Synonym: catechol, oxyphenol. Etc. Origin: Pyro- + catechu. Source: Websters Dictionary (01 Mar 1998) |
| pyrocatechol | 1,2-benzenediol;a constituent of the catecholamines, epinephrine and norepinephrine, and dopa; used externally as an antiseptic. Synonym: catechol, pyrocatechin. (05 Mar 2000) |
| pyrochlore | <chemical> A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish colour and resinous luster; so called from its becoming grass-green on being subjected to heat under the blowpipe. Origin: Pyro- + Gr. Pale green. Source: Websters Dictionary (01 Mar 1998) |
| pyrocitric | <chemistry> Pertaining to, or designating, any one of three acids obtained by the distillation of citric acid, and called respectively citraconic, itaconic, and mesaconic acid. Origin: Pyro- + citric: cf. F. Pyrocitrique. Source: Websters Dictionary (01 Mar 1998) |
| pyrococcus | A genus of strictly anaerobic ultrathermophilic archaea, in the family thermococcaceae, occurring in heated seawaters. They exhibit heterotrophic growth at an optimum temperature of 100 degrees c. (12 Dec 1998) |