Pronunciation: ' prä-s ə - ˌ bra ŋ k
Function: noun
Inflected Form: plural -branchs
Etymology: New Latin Prosobranchia, from proso- in front (fr. Greek pros ō forward) + branchia gills (fr. Gk)
Date: 1851
: 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