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Related to leptonic: antilepton


Any of a class of six elementary fermions, two in each of the three generations of fundamental fermions (one negatively charged and one neutral), and including the electron, electron neutrino, muon, muon neutrino, tauon, and tauon neutrino, together with their associated antiparticles, the antileptons. Leptons participate in weak interactions, but not strong interactions, and have masses generally less than those of mesons and baryons.

[lepto- + -on.]

lep·ton′ic (-tŏn′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ta (-tə)
1. (Currencies) a former Greek monetary unit worth one hundredth of a drachma
2. (Currencies) a small coin of ancient Greece
[from Greek lepton (nomisma) small (coin)]


(Atomic Physics) 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
[C20: from lepto- + -on]
lepˈtonic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈlɛp tɒn)

n., pl. -ta (-tə).
1. a monetary unit of modern Greece, equal to 1/100 of the drachma.
2. a small copper or bronze coin of ancient Greece.
[1715–25; < Greek leptón (nómisma) a small (coin), n. use of neuter of leptós small; see lepto-]


(ˈlɛp tɒn)
n., pl. -tons.
any of a class of elementary particles with spin of ½ that are not subject to the strong force, as the electron and muon.
[1948; < Greek, neuter of leptós small, slight; see lepto-, -on1]
lep•ton′ic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lepton - 100 lepta equal 1 drachma in Greece
Greek monetary unit - monetary unit in Greece
Greek drachma, drachma - formerly the basic unit of money in Greece
2.lepton - an elementary particle that participates in weak interactions; has a baryon number of 0
electron, negatron - an elementary particle with negative charge
elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter
fermion - any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle
mu-meson, muon, negative muon - an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino
neutrino - an elementary particle with zero charge and zero mass
tau-minus particle, tauon - a lepton of very great mass
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References in periodicals archive ?
Among specific topics are Jiangmen Underground Neutrino Observatory: status and prospectives, on quasi-degeneracy of majorana neutrinos and the observed pattern of leptonic mixing, the Planck legacy: reinforcing the case for a standard model of cosmology, the magnetic field evolution of neutron stars: linking magnetars and anti-magnetars, vacuum effects due to possible Lorentz violation and anomalous magnetic moment, and the intelligentsia and religion.
Neutrino Experiments and the Problem of Conservation of Leptonic Charge.
The Jagiellonian PET (J-PET) experiment aims at performing a test of the symmetry under reversal in time in a purely leptonic system constituted by orthopositronium (o-Ps) with a precision unprecedented in this sector.
lore) dietician = nutrition logician-tactician-technician-physician dismutation = oxygenation/hydrogenation disproportionation leptonic = electronic, muonic, tauonic (the three classes of lepton) luminescence = fluorescence, phosphorescence (the two main types of luminescence) patination = carbonation, oxidation (carbonation on copper/bronze, oxidation on other metals) stutter = shutter-utter (coinage, automatic camera metaphor) xenation = nonrelation visitation (from Jeff Grant; xenation (OED, rare) = sojourning as a stranger)
In this leptonic model, the prompt and AG radiation is synchrotron or synchrotron-self-Compton in origin [438].
Title: Leptonic and Hadronic Modeling of Fermi-Detected Blazars
Seventeen contributions describe the early history of CP violation theory; discuss experiments on CP violation with K and B mesons; discuss the measurement of leptonic CP violation in future neutrino facilities; examine CP violation in cosmology; and consider B physics at hadron colliders, among other topics.
Calculation of the one-loop leptonic vertex [^.[GAMMA].sup.e[nu]W], depicted by the shaded circle in the diagram 2, is straightforward and results in merely a multiplicative factor to [[GAMMA].sup.e[nu]W].
The initial appeal of the leptonic theory is its simplicity.
The feasibility of testing the time reversal symmetry in a purely leptonic system is reported by the Jagellonian-PET team from their pilot measurement involving the three photon decay of a positronium atom.