muon
An elementary particle similar to an electron but with greater mass. Used in physics contexts.
A muon has about 200 times the mass of an electron.
Cosmic rays contain muons.
Standard Japanese term for muon, using katakana for the particle name and kanji for 'particle'.
Scientific notation using the Greek letter μ; common in physics texts.
From English 'muon' (from Greek letter μ) + Japanese 粒子 (particle).