charmonium

[chahr-moh-nee-uh m]

noun Physics.

any meson composed of a charmed quark and a charmed antiquark.

Origin of charmonium

1970–75; charm¹ + -onium, probably extracted from positronium

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British Dictionary definitions for charmonium

charmonium

noun plural -nia

physics an elementary particle that contains an antiquark and a charm quark

Word Origin for charmonium

C20: from charm (sense 7)

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