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from the GNU version of the Collaborative International Dictionary of English

  • n. That part of a crustacean behind the cephalothorax; -- more commonly called abdomen.

from The Century Dictionary and Cyclopedia

  • n. A posterior abdominal part of the body in any way distinguished, as in an insect or a crustacean; in mollusks, the postanal part or region of the body; in ascidians, the prolongation of the abdomen beyond the alimentary canal. The tail of a scorpion, or the telson of a king-crab, is a postabdomen. See cut under Pedipalpi.


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