Is “Exciton” a Scrabble word?
Yes
EXCITON
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 Exciton
noun
1.A bound state of an electron and an electron hole in an insulator or semiconductor