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The negatively charged lepton that belongs to the second generation of elementary fermions and has a mass 207 times that of an electron and a mean lifetime of 2.2 × 10-6 second. Also called mu lepton.

[Earlier mu meson (from the use of the Greek letter mu, the equivalent of the Roman letter m of meson, to distinguish it from other mesons subsequently discovered, the class of particles to which it was formerly thought to belong).]

mu·on′ic 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.


(General Physics) a positive or negative elementary particle with a mass 207 times that of an electron and spin . It was originally called the mu meson but is now classified as a lepton
[C20: short for mu meson]
muonic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈmyu ɒn)

an unstable lepton of mass approximately 207 times greater than the electron's mass.
[1950–55; shortening of earlier mu meson; see mu, mes-, -on1]
mu•on′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.muon - an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino
lepton - an elementary particle that participates in weak interactions; has a baryon number of 0
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
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)
Their measurements have shown that neutrinos come in three varieties: electronic [v.sub.e], muonic [v.sub.[mu]] and tau-neutrino [v.sub.[tau]] [6, 14].
Drawn from the proceedings of the XXII International Conference on Laser Spectroscopy (ICOL2015), held in Singapore in June and July of 2015, the eight papers in this volume discuss quantum walks with neutral atoms in state-dependent optical lattices; the role of muonic atoms in nuclear structure; the development and optimization of Doppler broadening thermometry using acetylene as a molecular target; antiferromagnetism with ultracold atoms; the generation and transfer of stable optical frequencies in optical clocks with trapped ions; precision measurement of the Newtonian gravitational constant by atom interferometry; optical sideband cooling in a Penning trap; and Bose-Einstein condensation of photons vs.
Hermes et al., "A search for [mu] - e conversion in muonic gold," The European Physical Journal C, vol.
Contributions include a biography of Wolfgang Panofsky, research on bottomonium, the LSND and MiniBooNE experiments, axions, density functional theory and Fermi superfluids, fluid dynamics in relativistic collisions, supernovae, muonic hydrogen, CP violation in the Bs system, mixing angle evaluation of the Standard Model, liquid argon detectors, partonic structure of the proton, photodetectors in particle physics experimentation, supersymmetry, superheavy nuclei, electron-positron annihilation, two chapters on the Tevatron collider, two-neutrino double-beta decay, and lepton flavor-violation.
If such an experiment yields results similar to those of the muonic hydrogen one, Arrington says, then it's likely that new physics is at work.
The present acceptable muonic rest, mass is Mm=206,8me.
The muon's larger mass gives muonic hydrogen a smaller atomic size and allows a much larger interaction with the proton.
When a negative muon replaces an electron in the is orbital of an atom, then this atom is called a 'muonic' atom: [H.sup.+]& is 'muonic hydrogen'.
It is shown that this sheltering effect on Unruh radiation can account for about half of the proton radius anomaly in muonic hydrogen.