† metacetonicadj.

Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: metacetone n., -ic suffix.

Etymology: < metacetone n. + -ic suffix, after German Metaceton- (in Metacetonsäure: J. Gottlieb 1844, in Ann. der Chem. u. Pharm. 52 122) or French métacétonique (J. Dumas et al. 1847, in Comptes Rendus de l'Acad. des Sciences 25 781). Compare slightly later metacetic adj. N.E.D. (1906, s.v. Metacetone) gives the pronunciation of the second element as (-æsĭtǫ·nik) /-æsɪˈtɒnɪk/.

Chemistry. Obsolete.

metacetonic acid n. = propionic acid n. at propionic adj. 1a.

ΚΠ

1848 Mem. & Proc. Chem. Soc. London 1845–8 3 387 Formic acid, metacetonic acid, butyric acid, benzoic acid, &c.

1848 W. T. Brande Man. Chem. (ed. 6) 1733 Metacetonic Acid. Metacetylic Acid.

1867 C. L. Bloxam Chemistry 557 When this liquid [sc. metacetone] is heated with bichromate of potash and sulphuric acid, it is oxidised and converted into metacetonic or propionic acid.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online September 2018).

单词	metacetonic
释义	† metacetonicadj. Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: metacetone n., -ic suffix. Etymology: < metacetone n. + -ic suffix, after German Metaceton- (in Metacetonsäure: J. Gottlieb 1844, in Ann. der Chem. u. Pharm. 52 122) or French métacétonique (J. Dumas et al. 1847, in Comptes Rendus de l'Acad. des Sciences 25 781). Compare slightly later metacetic adj. N.E.D. (1906, s.v. Metacetone) gives the pronunciation of the second element as (-æsĭtǫ·nik) /-æsɪˈtɒnɪk/. Chemistry. Obsolete. metacetonic acid n. = propionic acid n. at propionic adj. 1a. ΚΠ 1848 Mem. & Proc. Chem. Soc. London 1845–8 3 387 Formic acid, metacetonic acid, butyric acid, benzoic acid, &c. 1848 W. T. Brande Man. Chem. (ed. 6) 1733 Metacetonic Acid. Metacetylic Acid. 1867 C. L. Bloxam Chemistry 557 When this liquid [sc. metacetone] is heated with bichromate of potash and sulphuric acid, it is oxidised and converted into metacetonic or propionic acid. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online September 2018). < adj.1848
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