tachyon

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtækɪˌɒn/US:USA pronunciation: respellingUSA pronunciation: respelling(tak′ē on′)


WordReference Random House Unabridged Dictionary of American English © 2025
tach•y•on  (tak′ē on′),USA pronunciation n. [Physics.]
  1. Physicsa hypothetical particle that travels faster than the speed of light.
  • tachy- + -on1 1967

Collins Concise English Dictionary © HarperCollins Publishers::
tachyon / ˈtækɪˌɒn/
  1. a hypothetical elementary particle capable of travelling faster than the velocity of light
Etymology: 20th Century: from tachy- + -on
'tachyon' also found in these entries (note: many are not synonyms or translations):
tachy-

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