prosobranch

pros·o·branch

noun \ˈprä-sə-ˌbraŋk\

plural pros·o·branchs

Definition of PROSOBRANCH

: any of a subclass (Prosobranchia) of gastropod mollusks that have the loop of visceral nerves twisted into a figure eight, the sexes usually separate, and usually an operculum

— prosobranch adjective

Origin of PROSOBRANCH

New Latin Prosobranchia, from proso- in front (from Greek prosō forward) + branchia gills (from Greek)

First Known Use: 1851