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English definition of “chitin”

chitin

noun [U]     /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 fungi Fruits and seeds and their partsThe skin, hair and bone of non-human animals
(Definition of chitin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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