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English definition of “tannin”

tannin

noun [C or U]     /ˈtæn.ɪn/ (also tannic acid,   /ˌtæn.ɪkˈæs.ɪd/   )
(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 eatPlant biochemistrySpecific chemicals, chemical compounds and gasesSubstances and structures in the bodyTypes of chemical
(Definition of tannin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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