subluminal
Adjective
Meaning
subluminal (comparative more subluminal, superlative most subluminal)
slower than light; having a speed less than light.
Synonyms
Antonyms
Related terms
Phrases with the word
Examples
Moreover, since tachyons are constrained to the spacelike portion of the energy–momentum graph, it could not slow down to subluminal speeds.
Wormholes If wormholes are possible, then ordinary subluminal methods of communication could be sent through them to achieve superluminal transmission speeds.