Definition of chitin
: a horny polysaccharide (C8H13NO5)n that forms part of the hard outer integument especially of insects, arachnids, and crustaceans
chitinousplay \ˈkī-tən-əs, ˈkīt-nəs\ adjective
Origin and Etymology of chitin
French chitine, from Greek chitōn
First Known Use: circa 1839
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