opisthobranch

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English[edit]

Pronunciation[edit]

  • /ɵˈpɪsθəbræŋks/

Noun[edit]

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opisthobranch ‎(plural opisthobranchs)

  1. Any of a large and diverse group of specialized complex marine gastropods previously united under Opisthobranchia within the Heterobranchia, characterized by two pairs of tentacles and a single gill behind and to the right of the heart.