a form of tannin with weak acidity, used commercially in dyes and wood stains; corrosion inhibitors; certain antihistamine, antitussive, and antidiarrhea medications; and especially wine, beer, and other beverages that benefit from its clarifying and aroma-enhancing properties: Aleppo galls are among the principal sources of tannic acid.
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How to use tannic acid in a sentence
He showed that the fustin-tannide could be decomposed by acetic acid into tannic acid and a glucoside, fustin C46H42O21.Some Constituents of the Poison Ivy Plant: (Rhus Toxicodendron) | William Anderson Syme
Its styptic properties are undoubtedly due to tannic acid, as all the tests I have been able to make prove this to be the case.
A teaspoonful of tannic acid should be added to the water in the jug prior to the commencement of the experiment.Magic | Ellis Stanyon
As an external astringent, it is greatly inferior to tannic acid.
In direct opposition to this latter practise, Jurgens and Westphal apply alkali, ostensibly to lessen the "tannic acid" content.All About Coffee | William H. Ukers
Scientific definitions for tannic acid
A lustrous, yellow-brown, amorphous substance, having the approximate chemical composition C76H52O46. It is derived from the bark and fruit of many plants and is used in tanning leather, in fixing dyes to materials, and in clarifying wine and beer.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.