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positron |
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positronAntiparticle of the electron; an elementary particle having the same mass as an electron but exhibiting a positive charge. The positron was discovered in 1932 by US physicist Carl Anderson at the California Institute of Technology, USA, its existence having been predicted by the British physicist Paul Dirac in 1928. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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 position vector positioning positive integer positive organ positive-sum situation positivism  positronpositron emission tomography POSIX Posner, Richard A(llen) possessive pronoun possible world possum post  |
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