antiproton

noun

an·​ti·​pro·​ton ˌan-tē-ˈprō-ˌtän How to pronounce antiproton (audio) ˌan-ˌtī- How to pronounce antiproton (audio)
: the antiparticle of the proton

Examples of antiproton in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Ninety-two antiprotons were transported six miles by truck. — Ann Manov, Harpers Magazine, 23 June 2026 On Tuesday the physicists loaded 92 antiprotons—the antimatter version of protons—into a truck and drove them around for about an hour and a half. — Emma Gometz, Scientific American, 25 Mar. 2026 Heavier particles like antiprotons (or calcium ions) prefer much slower megahertz (MHz) fields. — Rupendra Brahambhatt, Interesting Engineering, 11 Apr. 2026 The Baryon Antibaryon Symmetry Experiment or BASE, which focuses on antiprotons, is the one that relocated the substance. — Jacopo Prisco, CNN Money, 27 Mar. 2026 See All Example Sentences for antiproton

Word History

First Known Use

1931, in the meaning defined above

Time Traveler
The first known use of antiproton was in 1931

Rhymes for antiproton

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Browse Nearby Words

antiprothrombic
antiproton
antipruritic
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Cite this Entry

“Antiproton.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiproton. Accessed 7 Jul. 2026.

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Kids Definition

antiproton

noun
an·​ti·​pro·​ton ˌant-i-ˈprō-ˌtän How to pronounce antiproton (audio)
ˌan-ˌtī-
: the part of antimatter related to the proton

More from Merriam-Webster on antiproton

Britannica.com: Encyclopedia article about antiproton

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