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mu·on AHD[myo͞o′ŏn'] D.J.[ˈmjuːˌɒn]K.K.[ˈmjuˌɑn]n.Physics（名词）【物理学】- An elementary particle in the lepton family (not a meson), having a mass 209 times that of the electron, a negative electric charge, and a mean lifetime of 2.2 × 10-6 second. Also called mu meson See table at subatomic particle 介子：轻子族中的一种基本微粒（非介子），其质量为电子的209倍，是一种负电荷，平均寿命为2.2×10-6秒 也作 mu meson 参见 subatomic particle
- Short for mu meson mu meson的简写
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