# operculum

> hard structure which closes the aperture of a gastropod when the animal retreats into the shell

**Wikidata**: [Q1480851](https://www.wikidata.org/wiki/Q1480851)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Operculum_(gastropod))  
**Source**: https://4ort.xyz/entity/operculum


## References

1. Freebase Data Dumps. 2013
2. BabelNet