柯林斯詞典crustacean /kr??ste???n/ (crustaceans) 1. N-COUNT A crustacean is an animal with a hard shell and several pairs of legs, which usually lives in water. Crabs, lobsters, and shrimps are crustaceans. 甲殼綱動(dòng)物 返回 crustacean劍橋詞典any of various types of animal that live in water and have a hard outer shell 甲殼類動(dòng)物 返回 crustacean