# four-velocity

> analogue of velocity in four-dimensional spacetime

**Wikidata**: [Q1322540](https://www.wikidata.org/wiki/Q1322540)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Four-velocity)  
**Source**: https://4ort.xyz/entity/four-velocity


## References

1. Freebase Data Dumps. 2013