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Definition of kaon
: an unstable meson that occurs in both charged and neutral forms and is about 970 times more massive than an electron
From the M-W Editors
Recent Examples of kaon from the Web
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The most famous of these two-quark particles are kaons and pions.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'kaon'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of kaon
International Scientific Vocabulary ka kay (from K-meson, its earlier name) + 2-on
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