me·​son | \ ˈme-ˌzän How to pronounce meson (audio) , ˈme-ˌsän, ˈmā-ˌzän, ˈmā-ˌsän How to pronounce meson (audio) , ˈmē-ˌzän How to pronounce meson (audio) , ˈmē-ˌsän How to pronounce meson (audio) \

Definition of meson

: any of a group of fundamental particles (such as the pion and kaon) made up of a quark and an antiquark that are subject to the strong force and have zero or an integer number of quantum units of spin

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Other Words from meson

mesonic \ me-​ˈzä-​nik How to pronounce mesonic (audio) , me-​ˈsä-​ , mā-​ˈzä-​ , mā-​ˈsä-​ How to pronounce mesonic (audio) , mē-​ˈzä-​ , mē-​ˈsä-​ How to pronounce mesonic (audio) \ adjective

Examples of meson in a Sentence

Recent Examples on the Web The lightest pentaquark has a mass just below the sum of a particular baryon and meson that together contain the correct quark ingredients. Adrian Cho, Science | AAAS, "Exotic particles called pentaquarks may be less weird than previously thought," 5 June 2019 The heavier pentaquarks have masses just below the sum of the same baryon and a related meson with extra internal energy. Adrian Cho, Science | AAAS, "Exotic particles called pentaquarks may be less weird than previously thought," 5 June 2019 But the rho meson turned out to be something of a special case, and the bootstrap method soon lost momentum. Quanta Magazine, "Physicists Uncover Geometric ‘Theory Space’," 23 Feb. 2017 Then there are dozens of particles made up of those elementary particles, including hadrons, which are constructed of quarks and gluons, and mesons, made of a quark and anti-quark. Jason Daley, Smithsonian, "The Large Hadron Collider Is Getting A Huge Power Boost," 19 June 2018 However, measurements at the CERN collider have shown a definite propensity for the mesons to underproduce muons, as reported at CERN in April. Dennis Overbye, New York Times, "Yearning for New Physics at CERN, in a Post-Higgs Way," 19 June 2017

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

1939, in the meaning defined above

History and Etymology for meson

International Scientific Vocabulary mes- + -on entry 2

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Time Traveler for meson

Time Traveler

The first known use of meson was in 1939

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Cite this Entry

“Meson.” The Dictionary, Merriam-Webster Inc., Accessed 19 January 2020.

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More Definitions for meson


me·​son | \ ˈmez-ˌän How to pronounce meson (audio) , ˈmēz- How to pronounce meson (audio) , ˈmēs-, ˈmes- \

Medical Definition of meson

: any of a group of unstable elementary particles that are subject to nuclear forces and have masses much greater than that of the electron

Other Words from meson

mesonic \ me-​ˈzän-​ik How to pronounce mesonic (audio) , mē-​ How to pronounce mesonic (audio) , -​ˈsän-​ \ adjective

More from Merriam-Webster on meson

Rhyming Dictionary: Words that rhyme with meson Encyclopedia article about meson

Comments on meson

What made you want to look up meson? Please tell us where you read or heard it (including the quote, if possible).


to insert between existing elements

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