\Clasp"er\, n.
1. One who, or that which, clasps, as a tendril. ``The
   claspers of vines.'' --Derham.
2. (Zo["o]l.)
   (a) One of a pair of organs used by the male for grasping
       the female among many of the Crustacea.
   (b) One of a pair of male copulatory organs, developed on
       the anterior side of the ventral fins of sharks and
       other elasmobranchs. See Illust. of {Chim[ae]ra}.