uro·pod /ˈjʊrəˌpɑd/
  尾肢; 尾足
  U·ro·pod n.  Zool. Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda.
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