| 单词 | tannin |
| 释义 | Word Frequency tannin(ˈtænɪn) noun any of a class of yellowish or brownish solid compounds found in many plants and used as tanning agents, mordants, medical astringents, etc. Tannins are derivatives of gallic acid with the approximate formula C76H52O46 Also called: tannic acidWord origin C19: from French tanin, from tan1 |
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