say it: kruh-STAY-shuhn
crustacean is a noun and adjective meaning "any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton". It carries 2 recorded senses.
any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
of or belonging to the class Crustacea
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for crustacean come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.