Brachyura

Brach·y·u·ra

Brachyura

n. pl.
  1. A group of decapod Crustacea, including the common crabs, characterized by a small and short abdomen, which is bent up beneath the large cephalo-thorax. [Also spelt Brachyoura.] See Crab, and Illustration in Appendix. (Zool.)