antimatter
noun
an·ti·mat·ter
| \ Ëan-tÄ-Ëma-tÉr
, Ëan-ËtÄ«-\
, Ëan-ËtÄ«-\
Definition of antimatter
: matter composed of antiparticles
Examples of antimatter in a Sentence
Recent Examples on the Web
This phenomenon could happen if neutrinos turn out to be their own antimatter partner particlesâ a theoretical possibility but far from a certainty. — Clara Moskowitz, Scientific American, "Mysterious Neutrinos Get New Mass Estimate," 26 Aug. 2019 Instead, they are almost always found in groups of three in particles known as baryonsâincluding the proton and neutronâor in pairs called mesons, which consist of a quark and an antimatter quark. — Adrian Cho, Science | AAAS, "Exotic particles called pentaquarks may be less weird than previously thought," 5 June 2019 Lasers, antimatter and nukes Woodward and Fearnâs experiment is the most exotic of NIACâs propulsion grants. — Sarah Scoles, Scientific American, "The Good Kind of Crazy: The Quest for Exotic Propulsion," 29 July 2019 When antimatter and matter collide, the annihilation produces bursts of gamma rays. — Joe Lindsey, Popular Mechanics, "Filling the Void: What Is Dark Matter?," 28 May 2019 And dark matter isnât antimatter, either, which is normal matter composed of subatomic particles that have an exact opposite charge to matter. — Joe Lindsey, Popular Mechanics, "Filling the Void: What Is Dark Matter?," 28 May 2019 According to the Standard Model of particle physics, every particle has a mirror-image particle that carries the opposite electrical charge â an antimatter particle. — Quanta Magazine, "Neutrinos Suggest Solution to Mystery of Universeâs Existence," 12 Dec. 2017 From a quantum perspective, the vacuum of space continually produces pairs of virtual particles (matter and antimatter) that pop into existence and just as quickly annihilate away. — Jennifer Ouellette, Ars Technica, "Sonic black holes produce âHawking radiation,â may confirm famous theory," 30 May 2019 And as perfect as Paros seems, in recent years its smaller satellite, Antiparos (the name is a little absurd, almost comical, like antimatter), has become still more fashionable, a haunt of American rock and movie stars. — Adam Gopnik, Town & Country, "My First Visit to the Greek Islands Turned Out to Be a Journey Home," 20 May 2019These 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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