# half-life

> mean duration after which a decaying quantity has reached half of its initial value

**Wikidata**: [Q47270](https://www.wikidata.org/wiki/Q47270)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Half-life)  
**Source**: https://4ort.xyz/entity/half-life


## References

1. Freebase Data Dumps. 2013
2. YSO-Wikidata mapping project
3. UMLS 2023
4. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)