Meaning & use

chitin

noun·Advanced

A tough, semi-transparent substance that forms the exoskeletons of insects and shells of crustaceans.

See it in a sentence

A crab's hard shell is made largely of chitin, which protects its soft body inside.

Fungal cell walls also contain chitin, unlike the cellulose found in plant cell walls.

A note on using this word

Chitin is chemically similar to cellulose but is found in animals and fungi rather than plants.

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