Is “Muon” a Scrabble word?
Yes
MUON
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 Muon
/ˈmjuːɒn/
noun
1.An unstable elementary particle in the lepton family, having similar properties to the electron but with a mass 207 times greater.