'Prosobranchiata' definitions:

Definition of 'Prosobranchiata'

From: GCIDE

Prosobranchiata \Pros`o*bran`chi*a"ta\, n. pl. [NL., fr. Gr. ? forward, further + ? a gill.] (Zool.) The highest division, or subclass, of gastropod mollusks, including those that have the gills situated anteriorly, or forward of the heart, and the sexes separate. [1913 Webster]