Speed of light
WordNet
noun
(1) The speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
WiktionaryText
Noun
- The speed of electromagnetic radiation in a perfect vacuum: exactly 299,792,458 metres per second.
Related terms
- subluminal
- tardyon
- luxon
- tachyon
- faster-than-c
- faster-than-light (FTL)
- superluminal