noun
- Physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases. (.
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). relativistic mass. Retrieved September 23, 2026, from http://smartdefine.org/relativistic_mass/definitions/1323310 |
| Chicago | WordNet. 2010. "relativistic mass" http://smartdefine.org/relativistic_mass/definitions/1323310 (accessed September 23, 2026). |
| Harvard | WordNet 2010, relativistic mass, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/relativistic_mass/definitions/1323310>. |
| MLA | WordNet. "relativistic mass" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/relativistic_mass/definitions/1323310> |