# primary standard

> in metrology, highest quality standard accepted without reference to other standards of the same quantity

**Wikidata**: [Q911470](https://www.wikidata.org/wiki/Q911470)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Primary_standard)  
**Source**: https://4ort.xyz/entity/primary-standard


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)