antiproton

noun
an·ti·pro·ton | \ˌan-tē-ˈprō-ˌtän, ˌan-ˌtī-\

Definition of antiproton 

: the antiparticle of the proton

Examples of antiproton in a Sentence

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Since 2002, a few groups have been studying antihydrogen at the European particle physics laboratory, CERN, in Meyrin, Switzerland, the world's only major source of antiprotons. Adrian Cho, Science | AAAS, "Atoms and antiatoms haven’t crashed Albert Einstein’s theory of relativity—yet," 4 Apr. 2018 Obertelli and his colleagues plan to use magnetic and electric fields to trap a cloud of antiprotons within a vacuum (see ‘Antimatter to go’). Elizabeth Gibney, Scientific American, "Physicists Plan Antimatter's First Outing--in a Van," 21 Feb. 2018 But in reality, antimatter is really no different than regular matter, except that antimatter atoms have positrons instead of electrons and antiprotons instead of protons. Sophie Weiner, Popular Mechanics, "How To Make and Trap Antimatter," 1 Apr. 2017 The antiproton then floats out of the trap and into a surrounding array of particle detectors, in which it is annihilated and produces a subatomic blast. Adrian Cho, Science | AAAS, "Atoms and antiatoms haven’t crashed Albert Einstein’s theory of relativity—yet," 4 Apr. 2018 But in reality, antimatter is really no different than regular matter, except that antimatter atoms have positrons instead of electrons and antiprotons instead of protons. Sophie Weiner, Popular Mechanics, "How To Make and Trap Antimatter," 1 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antiproton.' 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 antiproton

1940, in the meaning defined above

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The first known use of antiproton was in 1940

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