We found 3 definitions of tannins from 2 different sources.
NounPlural: tannins |
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tannin - any of various complex phenolic substances of plant origin; used in tanning and in medicine | ||
tannic acid | ||
phenol any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups | ||
cutch, kutch tannin extract derived from any of several mangrove barks of Pacific areas |