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lepton

lep·ton [ lép tòn ] (plural lep·tons)

noun

Definition:

subatomic particle: a fundamental subatomic particle that interacts only weakly with other particles, e.g. the electron, muon, neutrino, and their antiparticles

[Mid-20th century. < Greek leptos "small"]

lep·ton·ic [ lep tónnik ] adjective

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