Nudibranchiata
Pronunciation : Nu`di*bran`chi*a"ta
Part of Speech : n.
Etymology : [NL. See Nude, and Branchia.] (Zo?l.)
Definition : Defn: A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia.
pl.
Source : Webster's Unabridged Dictionary, 1913