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crustacean

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The definition of a crustacean is an arthropod with a hard outer shell and jointed limbs that usually lives in aquatic environments.

(noun)

A lobster is an example of a crustacean.

See crustacean in Webster's New World College Dictionary

noun

any of a subphylum (Crustacea) of arthropods, including shrimps, crabs, barnacles, and lobsters, that usually live in the water and breathe through gills: they have a hard outer shell and jointed appendages

Origin: ModL Crustacea < crustaceus, having a crust or shell < L crusta, crust

adjective

of crustaceans

See crustacean in American Heritage Dictionary 4

crus·ta·cean

noun

Any of various predominantly aquatic arthropods of the class Crustacea, including lobsters, crabs, shrimps, and barnacles, characteristically having a segmented body, a chitinous exoskeleton, and paired, jointed limbs.

adjective

Of or belonging to the Crustacea.

Origin: From New Latin Crūstācea, class name, neuter pl. of crūstāceus, hard-shelled, from Latin crūsta, shell; see kreus- in Indo-European roots.

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