# gigaannum

> 10⁹ (one billion) years; geological unit of time

**Wikidata**: [Q524410](https://www.wikidata.org/wiki/Q524410)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Billion_years)  
**Source**: https://4ort.xyz/entity/gigaannum


## References

1. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)