tachy·​on | \ ˈta-kē-ˌän How to pronounce tachyon (audio) \

Definition of tachyon

: a hypothetical particle held to travel faster than light

Examples of tachyon in a Sentence

Recent Examples on the Web This predicts that every particle has a superpartner and, by an extraordinary coincidence, the same condition actually eliminates the tachyon. Lorenzo Bianchi, Newsweek, 19 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tachyon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of tachyon

1967, in the meaning defined above

History and Etymology for tachyon

tachy- + -on entry 2

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The first known use of tachyon was in 1967

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Cite this Entry

“Tachyon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tachyon. Accessed 27 Sep. 2021.

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More from Merriam-Webster on tachyon

Britannica English: Translation of tachyon for Arabic Speakers

Britannica.com: Encyclopedia article about tachyon


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