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tachyon Syllabification: tach·y·on
Pronunciation: /ˈtakēˌän/

Definition of tachyon in English:


A hypothetical particle that travels faster than light.
Example sentences
  • Small subatomic particles such as photons, particles of light, and hypothetical particles called tachyons seem to have no problem reaching light speed.
  • The biggest problem with bosonic string theory (aside from the lack of fermions) is that the lowest energy state was a tachyon, or a particle mode with negative mass squared.
  • The existence of tachyons is allowed by the equations of Einstein's special theory of relativity.


1960s: from tachy- 'swift' + -on.

Definition of tachyon in:
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