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Definition of crustacean

crustacean

/krʌˈsteɪ.ʃən/
crus · ta · cean
Plural:crustaceans
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crustacean Lexical Profile

crustacean Game Scores & Validity

• noun

1

Any chiefly aquatic arthropod of the subphylum Crustacea, such as a crab, lobster, shrimp, or barnacle, typically having a hard chitinous or calcareous exoskeleton, two pairs of antennae, and segmented limbs.

Example

"Crabs and lobsters are familiar crustaceans that shed their outer shells as they grow."

• adjective

1

Relating to, characteristic of, or belonging to the crustaceans.

Example

"The marine biologist studied the diverse crustacean populations inhabiting the coral reef."

Synonyms
View all synonyms for crustacean

• Rhymes for crustacean

• Nearby Words

crushingly
crushproof
crust
crustacean
crustiness
crustless
crustlike

Word Origin & Etymology

Coined in the early 19th century from Modern Latin Crustacea, derived from Latin crusta meaning 'hard shell, rind, or crust', in reference to the hard exoskeleton of these arthropods.

Cite this Entry

Wordmom. (2026). Definition of Crustacean. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/crustacean
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