psi particle

[sahy, psahy]
noun Physics.
any of a family of mesons consisting of a charmed quark and a charmed antiquark.
an early name for the J/psi particle.

1970–75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
psi particle
See J/psi particle

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
psi particle   (sī, psī)  Pronunciation Key 
See J/psi particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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