noun Date: circa 1847 a male copulatory structure: a. one of a pair of external anal processes of an insect that are used to grasp a female b. one of a pair of organs that are extensions of the pelvic fins of cartilaginous fishes

New Collegiate Dictionary. 2001.

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  • Clasper — Clasp er (kl[.a]sp [ e]r), n. 1. One who, or that which, clasps, as a tendril. The claspers of vines. Derham. [1913 Webster] 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… …   The Collaborative International Dictionary of English

  • clasper — the rod like extension of the medial portion of the pelvic fin in male Elasmobranchii and Holocephali. Claspers are used as intromittent organs (not in clasping), the grooves on their facing surfaces together forming a tube for the transmission… …   Dictionary of ichthyology

  • Clasper — Valva redirects here. For other uses, see Valva (disambiguation). The claspers of a spotted wobbegong shark (Orectolobus maculatus) In biology, a clasper is a male anatomical structure found some groups of animals, used in mating. Male… …   Wikipedia

  • Clasper (mathematics) — In the mathematical field of low dimensional topology, a clasper is a surface (with extra structure) in a 3 manifold on which surgery can be performed. Contents 1 Motivation 2 Definition 3 Clasper calculus …   Wikipedia

  • clasper gaff — the hook like structure on the inside of the clasper. Derived from denticles, e.g. in Squalus …   Dictionary of ichthyology

  • clasper spine — one or more needle like spines which project from the distal end of claspers and are proportionally much larger than clasper hooks. Derived from denticles, e.g. in Squalus and the Jurassic Paleospinax …   Dictionary of ichthyology

  • clasper — n. [ME. claspen, to embrace] 1. (ARTHROPODA: Crustacea) An appendage, including antenna, modified for holding of female during copulation; or an organ for fixation in parasites. 2. (ARTHROPODA: Insecta) a. A modified male appendage of certain… …   Dictionary of invertebrate zoology

  • clasper — /klas peuhr, klah speuhr/, n. 1. a person or thing that clasps. 2. (in insects, fishes, crustaceans, etc.) one of the modified, usually paired organs or parts by which the male clasps the female during copulation. [1545 55; CLASP + ER1] * * * …   Universalium

  • clasper — noun a) Anything that clasps b) Any of several appendages, in insects, crustacea and fish, that are used to clasp the female during copulation …   Wiktionary

  • clasper — Appendage, including antenna, modified for holding female during copulation; or an organ for fixation in parasites [McLaughlin, 1980]. Appendage, including antenna, that serves for attachment in copulation or as organ for fixation in parasites… …   Crustacea glossary

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