crustacean

from WordNet (r) 3.0 (2006)

crustacean
    adj 1: of or belonging to the class Crustacea [syn:
           {crustaceous}, {crustacean}]
    n 1: any mainly aquatic arthropod usually having a segmented
         body and chitinous exoskeleton

from The Collaborative International Dictionary of English v.0.48

Crustacean \Crus*ta"cean\ (kr?s-t?"shan; 97), a. (Zool.)
   Of or pertaining to the Crustacea; crustaceous. -- n. An
   animal belonging to the class Crustacea.
   [1913 Webster]

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