| NOUN | substance | tannic acid, tannin | any of various complex phenolic substances of plant origin |
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| Meaning | Any of various complex phenolic substances of plant origin; used in tanning and in medicine. | |
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| Synonym | tannin | |
| Narrower | catechin | A tannic acid that is extracted from black catechu as a white crystalline substance |
| cutch, kutch | tannin extract derived from any of several mangrove barks of Pacific areas | |
| Broader | phenol | Any of a class of weakly acidic organic compounds |
| Spanish | ácido tánico, tanino | |
| Catalan | àcid tànnic, taní | |
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