gallic acid

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gal·lic acid

 (găl′ĭk, gô′lĭk)
A colorless crystalline polyphenol, C7H6O5, derived from certain tannins and used as a tanning agent, as an ink dye, in photography, and in pharmaceuticals.

[French acide gallique, from galle, plant gall; see gall3.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gallic acid

(Elements & Compounds) 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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

gal′lic ac′id

a white or yellowish solid, C7H6O5, obtained from nutgalls, used esp. in tanning and dyes.
[1785–95; < French]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gallic acid - a colorless crystalline acid obtained from tannin
acid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
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