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gallic acid
noun Chemistry.
a white or yellowish, crystalline, sparingly water-soluble solid, C7H6O5, obtained from nutgalls, used chiefly in tanning and in ink dyes.
Origin:
1785–95; < French acide gallique
1785–95; < French acide gallique
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Gallic acid
is always a great word to know.
So is revive. Does it mean:
| to restore or reduce to the natural or uncombined state, such as a metal |
| with all water removed, especially water of crystallization |
Collins
World English Dictionary
| gallic acid | |
| —n | |
| 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 | |
| [C18: from French gallique; see | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia
gallic acid
substance occurring in many plants, either in the free state or combined as gallotannin. It is present to the extent of 40-60 percent combined as gallotannic acid in tara (any of various plants of the genus Caesalpinia) and in Aleppo and Chinese galls (swellings of plant tissue), from which it is obtained commercially by the action of acids or alkalies. An Aleppo gall has a spherical shape, is hard and brittle, and is about the size of a hickory nut; it is produced on oak twigs by a gall wasp (Cynips tinctoria). A Chinese gall is produced by insects on Asian sumac (Rhus semialata).
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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