plural noun
crus·​ta·​cea | \ ˌkrə-ˈstā-sh(ē-)ə How to pronounce crustacea (audio) \

Definition of crustacea

: arthropods that are crustaceans

First Known Use of crustacea

1814, in the meaning defined above

History and Etymology for crustacea

New Latin, group name, from neuter plural of crustaceus

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The first known use of crustacea was in 1814

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Cite this Entry

“Crustacea.” Dictionary, Merriam-Webster, Accessed 1 Dec. 2020.

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More Definitions for crustacea


noun plural
crus·​ta·​cea | \ ˌkrəs-ˈtā-sh(ē-)ə How to pronounce crustacea (audio) \

Medical Definition of crustacea

1 capitalized : a large class of mostly aquatic arthropods that have a chitinous or calcareous and chitinous exoskeleton, a pair of often much modified appendages on each segment, and two pairs of antennae and that include the lobsters, shrimps, crabs, wood lice, water fleas, and barnacles
2 : arthropods of the class Crustacea

Other Words from crustacea

crustacean \ -​shən How to pronounce crustacean (audio) \ adjective or noun

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