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nouna hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retractedtype of:
Definition that contains operculum
- operculated having an operculum
- opisthobranchia gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
- operculate having an operculum
- subclass opisthobranchia gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
- nerita a neritid gastropod having a short smooth or spirally ridged shell with thick usually toothed outer lip and toothed operculum