proton definition, proton meaning | English dictionary

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proton

  

      n   a stable, positively charged elementary particle, found in atomic nuclei in numbers equal to the atomic number of the element. It is a baryon with a charge of 1.6022x10--19 coulomb, a rest mass of 1.67252x10--27 kilogram, and spin ½  
     (C20: from Greek protos first)  


proton microscope  
      n   a powerful type of microscope that uses a beam of protons, giving high resolution and sharp contrast  
proton number  
      n      another name for       atomic number     (Symbol)    Z  
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