Source : Webster's Revised Unabridged Dictionary (1913)

Gephyrea \Ge*phyr"e*a\, n. pl. [NL., fr. Gr. ? a dam, a bridge.]
   (Zo["o]l.)
   An order of marine Annelida, in which the body is
   imperfectly, or not at all, annulated externally, and is
   mostly without set[ae].