Tachyon
noun, Physics.
1.
a hypothetical particle that travels faster than the speed of light.
noun
1.
(physics) a hypothetical elementary particle capable of travelling faster than the velocity of light
tachyon
(tāk’ē-ŏn’)
A hypothetical subatomic particle that travels faster than the speed of light. Although the principles of relativity forbid the acceleration of a particle past the speed of light, they do not prohibit the existence of particles that have always moved faster than that speed. No such particle has ever been detected.
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