Nudibranchia

Thesaurus

Noun

1.

Nudibranchia - comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slugorder Nudibranchiaanimal order - the order of animalsOpisthobranchia, subclass Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea haresnudibranch, sea slug - any of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored bodyAplysiidae, family Aplysiidae, family Tethyidae, Tethyidae - sea haresgenus Hermissenda, Hermissenda - genus of marine sea slugs