positron definition, positron meaning | English dictionary

Search also in: Web News Encyclopedia Images



      n     (Physics)   the antiparticle of the electron, having the same mass but an equal and opposite charge. It is produced in certain decay processes and in pair production, annihilation occurring when it collides with an electron  
     (C20: from posi(tive + elec)tron)  

positron emission tomography  
      n   a technique for assessing brain activity and function by recording the emission of positrons when radioactively labelled glucose, introduced into the brain, is metabolized  
English Collins Dictionary - English Definition & Thesaurus  
Add your entry in the Collaborative Dictionary.