'Polybranchia' definitions:

Definition of 'Polybranchia'

From: GCIDE
  • Polybranchia \Pol`y*bran"chi*a\, n. pl. [NL. See Poly-, and Branchia.] (Zool.) A division of Nudibranchiata including those which have numerous branchi[ae] on the back. [1913 Webster]