crus·ta·cean /ˌkrʌsˈteʃən/
  (a.)甲殼類的甲殼類
  crus·ta·cean /-ʃən/ 形容詞 名詞
  甲殼動物(動),甲殼屬
  Crus·ta·cean a. Zool. Of or pertaining to the Crustacea; crustaceous. -- n. An animal belonging to the class Crustacea.
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  crustacean
       adj : of or belonging to the class Crustacea [syn: crustaceous]
       n : any mainly aquatic arthropod usually having a segmented body
           and chitinous exoskeleton