tachyon
(redirected from Imaginary mass)Also found in: Encyclopedia.
tach·y·on
(tăk′ē-ŏn′)n.
A hypothetical subatomic particle that always travels faster than the speed of light.
tach′y·on′ic adj.
tachyon
(ˈtækɪˌɒn)n
(Nuclear Physics) physics a hypothetical elementary particle capable of travelling faster than the velocity of light
[C20: from tachy- + -on]
tach•y•on
(ˈtæk iˌɒn)n.
a hypothetical subatomic particle that travels faster than the speed of light.
[1967; < Greek tachý(s) swift]