ˌan-tī- How to pronounce antineutron (audio)
: the antiparticle of the neutron

Examples of antineutron in a Sentence

Recent Examples on the Web Specifically, Vorobyev’s team zeroed in on a version of the antiparticle known as antihelium-3, composed of two antiprotons and one antineutron. Sophia Chen, WIRED, 14 Dec. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'antineutron.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of antineutron was in 1949

Dictionary Entries Near antineutron

Cite this Entry

“Antineutron.” Dictionary, Merriam-Webster, Accessed 24 Sep. 2023.

Kids Definition


an·​ti·​neu·​tron ˌant-i-ˈn(y)ü-ˌträn How to pronounce antineutron (audio)
: the uncharged part of antimatter that is related to the neutron

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