English word muon comes from English meson, English mu (The 12th letter of the Modern Greek alphabet.)
| Dictionary entry | Language | Definition |
|---|---|---|
| meson | English (en) | (now specifically, particle) An elementary particle that is composed of a quark and an antiquark, such as a kaon or pion. (Mesons composed of rarer quarks are much heavier.). (obsolete) A member of a group of subatomic particles having a mass intermediate between electrons and protons. (The most easily detected mesons fit this definition.). |
| mu | English (en) | The 12th letter of the Modern Greek alphabet. |
| mu-meson | English (en) | (dated) A muon (kind of subatomic particle). |
| muon | English (en) | An unstable elementary particle in the lepton family, having similar properties to the electron but with a mass 209 times greater. |