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English definition of “chitin”

chitin

noun [U] uk   /ˈkaɪ.tɪn/ us    /-tən/ specialized
a hard substance in the outer shell of insects and animals such as shrimp and lobster, and in the cell walls of some fungiFruits and seeds and their partsThe skin, hair and bone of non-human animals
(Definition of chitin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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