Search Result：subclass opisthobranchia
subclass opisthobranchia 
(TTS Sound)
(TTS Sound)Overview of noun subclass_opisthobranchia
The noun subclass opisthobranchia has 1 sense
- Opisthobranchia, subclass Opisthobranchia -- (gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares)