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nudibranchiata |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Nudibranchiata \Nu`di*bran`chi*a"ta\, n. pl [NL. See {Nude}, and {Branchia}.] (Zo["o]l.) 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}.