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BNC: 27884 COCA: 22455

tannin

noun
/ˈtænɪn/
/ˈtænɪn/
(also tannic acid)
[uncountable]
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  1. a yellow or brown substance found in the bark of some trees and the fruit of many plants, which is present in wine and tea and used in making leather 单宁;单宁酸;鞣质
    Word Originearly 19th cent.: from French tanin, from tan ‘tanbark’ (ultimately related to tan) + -in.
BNC: 27884 COCA: 22455
BNC: 27884 COCA: 22455
BNC: 27884 COCA: 22455

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