An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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tachyon
  تاکیون  
tâkion (#)
Fr.: tachyon  

A hypothetical subatomic particle that travels faster than the speed of light.

See also: From tachy- a combining form meaning “swift,” from Gk. tachys “swift” + → -on.