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BNC: 27884 COCA: 22455
tannin
noun [C/U] /ˈtænɪn/
singulartannin
pluraltannins
  1. 1
    a yellow-brown substance from trees and plants used in making leather (用来制革的)丹宁酸,鞣酸
     Synonyms and related words
    Substances in or from plants: agar, alkaloid, balsam...
     Synonyms and related words
  2. 2
    a substance in wine that gives it a slightly bitter taste (使酒略带苦味的)丹宁
     Synonyms and related words

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