Is “Charmonium” a Scrabble word?
Yes
CHARMONIUM
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Charmonium
noun
1.Any meson formed from a charm quark and its antiquark.