an·​ti·​mat·​ter | \ ˈan-tē-ˌma-tər, ˈan-ˌtī- How to pronounce antimatter (audio) \

Definition of antimatter

: matter composed of antiparticles

Examples of antimatter in a Sentence

Recent Examples on the Web Zandri and Hooker are like pop music’s matter and antimatter, and it’s among the film’s virtues to leave it doubt which is which. Richard Brody, The New Yorker, "“Dons of Disco,” Reviewed: A Stranger-Than-Fiction Battle in the World of Italian Pop," 27 Feb. 2021 To measure the telltale magnetism, g-2 researchers fire a beam of muons (or, to be more precise, their antimatter counterparts) into a 15-meter-wide circular particle accelerator. Adrian Cho, Science | AAAS, "The cloak-and-dagger tale behind this year’s most anticipated result in particle physics," 27 Jan. 2021 The top notes are listed as cosmic dust and antimatter particles, the heart of the fragrance is described as starlight, the scent of Supernova, and the base notes are atmospheric vapour, and dark nebulae. Essence, "Travis Scott Teamed Up With Luxury Fragrance Brand Byredo Collection Inspired By Outer Space," 3 Dec. 2020 Notes include cosmic dust, antimatter particles, starlight, the scent of supernova, atmospheric vapour, and dark nebulae. Jenna Rosenstein, Harper's BAZAAR, "Travis Scott's Byredo Scent Collab, Space Rage, is Already Sold Out," 1 Dec. 2020 His research addressed issues as diverse as the asymmetry between matter and antimatter in the universe, the theory of black holes, the nature of dark matter and the origin of galaxies. Paul Davies, Scientific American, "In Memoriam: John D. Barrow," 10 Oct. 2020 Individual particles of light called photons will pick up enough energy to turn into pairs of electrons and positrons, the antimatter equivalents of electrons. National Geographic, "Astronomers spot the biggest, strangest black hole collision ever found," 2 Sep. 2020 These include the familiar electron, along with its heavier relatives, the muon and tau (each of which has antimatter counterparts), along with three corresponding types of neutrinos and anti-neutrinos. John Timmer, Ars Technica, "Neutrinos may help us understand how matter prevailed over antimatter," 15 Apr. 2020 But the more protons and neutrons outnumber their antimatter counterparts, the less accurate those calculations become. Quanta Magazine, "Physicists Peer Inside a Fireball of Quantum Matter," 30 July 2019

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

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First Known Use of antimatter

1950, in the meaning defined above

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Time Traveler for antimatter

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The first known use of antimatter was in 1950

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Statistics for antimatter

Last Updated

4 Mar 2021

Cite this Entry

“Antimatter.” Dictionary, Merriam-Webster, Accessed 5 Mar. 2021.

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