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lepton
1[ lep-ton ]
/ ˈlɛp tɒn /
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noun, plural lep·ta [lep-tuh]. /ˈlɛp tə/.
an aluminum coin of modern Greece until the euro was adopted, one 100th of a drachma.
a small copper or bronze coin of ancient Greece.
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Origin of lepton
1First recorded in 1715–25; from Greek leptón (nómisma) “a small (coin),” noun use of neuter of leptós small; see lepto-
Words nearby lepton
Other definitions for lepton (2 of 2)
lepton2
[ lep-ton ]
/ ˈlɛp tɒn /
noun Physics.
any of a class of particles with spin of ½ that are not subject to the strong force and that are believed to be truly elementary and not composed of quarks or other subunits. The leptons known or believed to exist are the electron and electron-neutrino, the muon and mu-neutrino, and the tau lepton and tau-neutrino.
Compare conservation of lepton number.
OTHER WORDS FROM lepton
lep·ton·ic, adjectiveDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use lepton in a sentence
British Dictionary definitions for lepton (1 of 2)
lepton1
/ (ˈlɛptɒn) /
noun plural -ta (-tə)
a former Greek monetary unit worth one hundredth of a drachma
a small coin of ancient Greece
Word Origin for lepton
from Greek lepton (nomisma) small (coin)
British Dictionary definitions for lepton (2 of 2)
lepton2
/ (ˈlɛptɒn) /
noun
physics any of a group of elementary particles and their antiparticles, such as an electron, muon, or neutrino, that participate in electromagnetic and weak interactions and have a half-integral spin
Derived forms of lepton
leptonic, adjectiveWord Origin for lepton
C20: from lepto- + -on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Scientific definitions for lepton
lepton
[ lĕp′tŏn′ ]
Any of a family of elementary particles that interact through the weak force and do not participate in the strong force. Leptons include electrons, muons, tau particles, and their respective neutrinos, the electron neutrino, the muon neutrino, and the tau neutrino. The antiparticles of these six particles are also leptons. Compare hadron. See Note at elementary particle. See Table at subatomic particle.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for lepton
lepton
[ (lep-ton) ]
Any one of six elementary particles that are one of the fundamental constituents of matter. Leptons are not affected by the strong force and are not normally found in the nucleus of the atom. The electron and the neutrino are examples of leptons.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.