# relative density

> ratio of the density (mass per volume) of a substance to the density of a given reference material

**Wikidata**: [Q11027905](https://www.wikidata.org/wiki/Q11027905)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Relative_density)  
**Source**: https://4ort.xyz/entity/relative-density


## References

1. Freebase Data Dumps. 2013
2. ISO 80000-4:2006 Quantities and units—Part 4: Mechanics
3. ISO 80000-4:2019 Quantities and units — Part 4: Mechanics
4. UMLS 2023
5. Quora
6. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)