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gallic acid

noun, Chemistry.
a white or yellowish, crystalline, sparingly water-soluble solid, C 7 H 6 O 5 , obtained from nutgalls, used chiefly in tanning and in ink dyes.
Origin of gallic acid
1785-95; < French acide gallique Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for gallic-acid

gallic acid

a colourless crystalline compound obtained from tannin: used as a tanning agent and in making inks, paper, and pyrogallol; 3,4,5-trihydroxybenzoic acid. Formula: C6H2(OH)3COOH
Word Origin
C18: from French gallique; see gall³
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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