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English definition of “tannin”

tannin

noun [C or U] uk   /ˈtæn.ɪn/ (also tannic acid,   /ˌtæn.ɪkˈæs.ɪd/   ) us  
(one of) a group of chemicals that are found in plant cells, especially in leaves, bark (= a tree's outer covering), and fruit that is not yet ready to eat
(Definition of tannin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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