pion definition, pion meaning | English dictionary

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pion

  
, pi meson  
      n     (Physics)   a meson having a positive or negative charge and a rest mass 273 times that of the electron, or no charge and a rest mass 264 times that of the electron  
     (C20: from Greek letter pi1 + on)  
English Collins Dictionary - English Definition & Thesaurus  
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piton, prion, PIN, Pioneer

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