Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of pygobranchia is as below...

Rhinophore :: Rhinophore (n.) One of the two tentacle-like organs on the back of the head or neck of a nudibranch or tectibranch mollusk. They are usually retractile, and often transversely furrowed or plicate, and are regarded as olfactory organs. Called also dorsal tentacles. See Illust. under Pygobranchia, and Opisthobranchia..

Pygobranchia :: Pygobranchia (n. pl.) A division of opisthobranchiate mollusks having the branchiae in a wreath or group around the anal opening, as in the genus Doris..

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