Source : Webster's Revised Unabridged Dictionary (1913)

Clasper \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}.