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psi particle

[sahy, psahy] /saɪ, psaɪ/
noun, Physics.
1.
any of a family of mesons consisting of a charmed quark and a charmed antiquark.
2.
an early name for the J/psi particle.
Origin
1970-1975
1970-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for psi-particle

psi particle

noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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psi-particle in Science
psi particle
  (sī, psī)   
See J/psi particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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