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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 ?
This interaction incites a chain reaction that produces a shower of charged particles, such as muons, the heavy cousins of electrons.
In fact, they would work less well inside, because gamma radiation coming off the melted fuel would make it harder to spot the muons. Instead, the detectors will be set up a few feet away from the reactor buildings' outer walls, and will be shielded with four inches of steel, which will stop the gamma rays but makes no difference to the muons.
is uses muons to measure tidal movements from three quarters of a kilometre below the sea bed, as the mine extends six kilometres out from the shore, beneath the North Sea.
Abbott et al., "Search for excited electrons and muons in [square root of s] = 8 TeV proton-proton collisions with the ATLAS detector," New Journal of Physics, vol.
In their experiment of the measurement of the lifetime of positive and negative muons in a circular orbit, Bailey et al [2] obtained lifetimes of high-speed muons which they then reduced to a mean proper lifetime at rest, assuming that special relativity holds in their accelerated muon experimental setup.
Muons are created from the impact of cosmic rays crashing into atoms in Earth's upper atmosphere, from where they then fall to Earth's surface.
Special detectors recorded by-products of the cosmic ray known as muons that are only partially absorbed by stone and take noticeably different trajectories through air.
hidden construction PYRAMID, it accessible author Tayoubi They employed byproducts of the cosmic ray known as muons that are only partially absorbed by stone and take noticeably different trajectories through air.
So, we can speculate it might have something to do with the muons. Basically, the bigger the creature is the bigger the increase in radiation would have been."
Together, Qahtani and Mohamed are using Texas A&M at Qatar's supercomputer, Raad2, to simulate a new detector called the gas electron multiplier (GEM) that will be installed in the muon chamber in CERN's Large Hadron Collider's Compact Muon Solenoid (CMS) project, which detects the muons that are generated from the proton-proton collisions.