Prosobranchiata

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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]