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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.


(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


(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.
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
References in periodicals archive ?
A personalized literacy environment, myON Reader engages students at all reading levels with its library of more than 10,000 enhanced digital books.
These profiles include the work of digital classroom software developers SMART Technologies, online literacy programmers myOn, personal learning platform creators DreamBox Learning, publishers McGraw-Hill Education, and Middlebury Interactive Languages.
The Yemeni forces also disclosed that they have discovered documents showing that the US intends to establish a military base on Saudi Arabia's Myon Island near Bab al-Mandeb Strait to protect their own interests and ensure the security of Israel.
khur khyer ba gan ze na I gan zag ces brjod par bya ste I tshe dan ldan pa min ni 'di lta bu I rus ni 'di lta bu I rigs ni 'di lta bu I kha zas ni 'di Ita bu I bde ba dan sdug bsnal ni 'di Ita bu dag myon zin tshe rin pa 'am thun nu 'di tsam zig tu gnas te I tshe 'i mtha' 'di tsam du gyur zes bya 'o (f) II
Seven Lions with Myon & Shane 54 featuring Tove Lo, "Strangers" 8.
Marine forces confiscated a shipment of smuggled pesticideson Mondayin international waters near Yemen's Myon Island coming from Djibouti.
That's why we wanted Myon to project a friendly, positive persona even though it's obviously not actually a person," explains Andre Poulheim, one of Myon's designers.
When a military coup deposed the democratic government of South Korea in 1961, Prime Minister Chang Myon was put under house arrest, his imminent execution feared.
Dreno B, Finlay AY, Nocera T, Verrier F, Taieb C, Myon E: The Cardiff Acne Disability Index: cultural and linguistic validation in French.
The Second Republic under the leadership of Chang Myon ended after only one year, when Major General Park Chung-hee led a military coup.
On the issue of achieving North Korea's denuclearization, Lee Myon Woo, senior research fellow at the Sejong Institute near Seoul, said the DPJ should not rush.
In this way the well-known Myon experiment can be interpreted for example [1].