pyroacidn.

Brit.

/ˌpʌɪrəʊˈasɪd/, U.S.

/ˌpaɪroʊˈæsəd/

Forms: 1800s pyracid, 1800s– pyroacid.

Origin: Formed within English, by compounding. Etymons: pyro- comb. form, acid n.

Etymology: < pyro- comb. form + acid n.

Chemistry.

An acid obtained from another acid by the action of heat, as by destructive distillation. Cf. pyro- comb. form 3.

ΚΠ

1835 W. T. Brande in Todd's Cycl. Anat. & Physiol. I. 47/1 The other animal acids..are artificially produced... Such as the..animal pyroacids.

1839 J. W. Webster Man. Chem. (ed. 3) vi. 366 When the heat is not too high, the acid is resolved into a pyracid, carbonic acid and water.

1913 S. B. Schryver Gen. Char. Proteins ii. 30 Metaphosphoric acid is a precipitant of the proteins, but not the ortho- or pyro-acids.

1962 M. P. Crosland Hist. Stud. Lang. Chem. v. i. 292 One of the few examples of names based on the method of preparation of a compound is that of the group of ‘pyro-acids’.

2002 J. Lehr et al. Handbk. Complex Environmental Remediation Probl. iii. 9 (table) VOC [= volatile organic compound]..consists primarily of methanol, acetic acid, formaldehyde, pyroacids, and unsaturated hydrocarbons.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online June 2022).

单词	pyroacid
释义	pyroacidn. Brit. /ˌpʌɪrəʊˈasɪd/, U.S. /ˌpaɪroʊˈæsəd/ Forms: 1800s pyracid, 1800s– pyroacid. Origin: Formed within English, by compounding. Etymons: pyro- comb. form, acid n. Etymology: < pyro- comb. form + acid n. Chemistry. An acid obtained from another acid by the action of heat, as by destructive distillation. Cf. pyro- comb. form 3. ΚΠ 1835 W. T. Brande in Todd's Cycl. Anat. & Physiol. I. 47/1 The other animal acids..are artificially produced... Such as the..animal pyroacids. 1839 J. W. Webster Man. Chem. (ed. 3) vi. 366 When the heat is not too high, the acid is resolved into a pyracid, carbonic acid and water. 1913 S. B. Schryver Gen. Char. Proteins ii. 30 Metaphosphoric acid is a precipitant of the proteins, but not the ortho- or pyro-acids. 1962 M. P. Crosland Hist. Stud. Lang. Chem. v. i. 292 One of the few examples of names based on the method of preparation of a compound is that of the group of ‘pyro-acids’. 2002 J. Lehr et al. Handbk. Complex Environmental Remediation Probl. iii. 9 (table) VOC [= volatile organic compound]..consists primarily of methanol, acetic acid, formaldehyde, pyroacids, and unsaturated hydrocarbons. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online June 2022). < n.1835
随便看	miscommunicating miscommunication miscommunications miscompare miscomplacence miscomplain miscomplaint miscompose miscomprehend miscomprehended miscomprehending miscomprehends miscomprehension miscomprehensions miscomputation miscomputations miscompute miscomputed miscomputes miscomputing miscon misconcealed misconceit misconceited misconceive