Definition of crustacean noun from the Oxford Advanced Learner's Dictionary



BrE BrE//krʌˈsteɪʃn//
; NAmE NAmE//krʌˈsteɪʃn//
(specialist) Invertebrates
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any creature with a soft body that is divided into sections, and a hard outer shell. Most crustaceans live in water. Crabs, lobsters and shrimps are all crustaceans. compare shellfish See related entries: Invertebrates
See the Oxford Advanced American Dictionary entry: crustacean