tachyon

noun

tachy·​on ˈta-kē-ˌän 

: a hypothetical particle held to travel faster than light

Examples of tachyon in a Sentence

Recent Examples on the Web

Yes, there is a hypothetical particle, called the tachyon, that could travel back in time. — Paul M. Sutter, Discover Magazine, 21 Feb. 2023

The tachyon particle has an intriguing time travel component. — Tim Newcomb, Popular Mechanics, 21 Feb. 2023

The introduction of supersymmetry also solved the nasty problem of tachyons by replacing those troublesome particles with supersymmetric partners, which was a nice flourish. — Paul Sutter, Ars Technica, 27 Jan. 2023

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

Word History

Etymology

tachy- + -on entry 2

First Known Use

1967, in the meaning defined above