Pion (noun) Definition, Meaning & Examples

noun Physics.
  1. the first meson to be discovered: it has spin 0 and may be positively or negatively charged or neutral; charged pions decay into a muon and a neutrino or antineutrino. Symbol: π
noun
  1. a meson having a positive or negative charge and a rest mass 273.13 times that of the electron, or no charge and a rest mass 264.14 times that of the electron
    Pion (noun) Definition, Meaning & Examples

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