Venus's girdle Meaning, Definition & Usage

  1. noun ctenophore having a ribbon-shaped iridescent gelatinous body
    Cestum veneris.

WordNet

Definitions
  1. (Zoöl.), a long, flat, ribbonlike, very delicate, transparent and iridescent ctenophore (Cestum Veneris) which swims in the open sea. Its form is due to the enormous development of two spheromeres. See Illust. in Appendix.

Webster 1913