† metagallicadj.

Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: meta- prefix, gallic adj.²

Etymology: < meta- prefix + gallic adj.², after French métagallique (T. J. Pelouze 1833, in Ann. de Chim. et de Physique 54 353). N.E.D. (1906) gives the pronunciation as (metăgæ·lik) /mɛtəˈɡælɪk/.

Chemistry. Obsolete.

metagallic acid n. a black solid obtained by heating gallic acid (not identified).

ΚΠ

1835 Amer. Jrnl. Sci. 28 126 The metagallic acid is of a brilliant black color, insipid, and insoluble in water.

1850 G. Fownes Man. Elem. Chem. (ed. 3) iii. 470 Metagallic acid is insoluble in water, but dissolves in alkalis, and is again precipitated as a black powder by the addition of an acid.

1889 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. (rev. ed.) II. 595/1 If rapidly heated to 250° there is formed, instead of pyrogallol, a black lustrous insoluble mass, soluble in alkalis (so-called ‘Metagallic acid’).

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

单词	metagallic
释义	† metagallicadj. Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: meta- prefix, gallic adj.² Etymology: < meta- prefix + gallic adj.², after French métagallique (T. J. Pelouze 1833, in Ann. de Chim. et de Physique 54 353). N.E.D. (1906) gives the pronunciation as (metăgæ·lik) /mɛtəˈɡælɪk/. Chemistry. Obsolete. metagallic acid n. a black solid obtained by heating gallic acid (not identified). ΚΠ 1835 Amer. Jrnl. Sci. 28 126 The metagallic acid is of a brilliant black color, insipid, and insoluble in water. 1850 G. Fownes Man. Elem. Chem. (ed. 3) iii. 470 Metagallic acid is insoluble in water, but dissolves in alkalis, and is again precipitated as a black powder by the addition of an acid. 1889 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. (rev. ed.) II. 595/1 If rapidly heated to 250° there is formed, instead of pyrogallol, a black lustrous insoluble mass, soluble in alkalis (so-called ‘Metagallic acid’). This entry has been updated (OED Third Edition, December 2001; most recently modified version published online June 2018). < adj.1835
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