opisthobranch
English
Etymology
From Ancient Greek ὄπισθεν (ópisthen, “behind”) + βράγχια (bránkhia, “gills”).
Pronunciation
- IPA(key): /ɵˈpɪsθəbɹæŋk/
Noun
opisthobranch (plural opisthobranchs)
- (zoology) A gastropod with gills behind the heart, formerly thought to belong to a single group.
Adjective
opisthobranch (not comparable)
- (of gills) Placed behind the heart.
- Antonym: prosobranch
- (of a gastropod) Having gills placed behind the heart.
- Antonym: prosobranch