- The definition of a crustacean is an arthropod with a hard outer shell and jointed limbs that usually lives in aquatic environments.
A lobster is an example of a crustacean.
Origin: Modern Latin Crustacea ; from crustaceus, having a crust or shell ; from Classical Latin crusta, crust
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Origin: From New Latin Crūstācea, class name, neuter pl. of crūstāceus, hard-shelled, from Latin crūsta, shell; see kreus- in Indo-European roots.
crustacean - Cultural Definition
A class of arthropods with shells.
- Crabs, lobsters, shrimp, and crayfish are crustaceans.
crustacean - Science Definition
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