charmonium
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Related to charmonia: charmonium
char·mo·ni·um
(chär-mō′nē-əm)n.
Any of various elementary particles consisting of a charm quark and an antiquark.
[From charm.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
charmonium
(tʃɑːˈməʊnɪəm)n, pl -nia
(Atomic Physics) physics an elementary particle that contains an antiquark and a charm quark
[C20: from charm (sense 7)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014