tannic acid Hear it!

tannic acid definition

tannic acid

  1. a yellowish, astringent substance, CHO, derived from oak bark, gallnuts, etc. and used in tanning hides, in medicine, etc.
  2. any of a number of similar substances

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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