clasper

n. 1. One who, or that which, clasps, as a tendril. “The claspers of vines.” Derham. [ 1913 Webster ]

2. (Zool.) (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 Chimæra. [ 1913 Webster ]