Is “Lexemes” a Scrabble word?
Yes
LEXEMES
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 Lexemes
/ˈlɛksiːmz/
noun
1.A unit of lexical meaning, roughly corresponding to the set of inflected forms taken by a single word.
2.An individual instance of a continuous character sequence without spaces, used in lexical analysis (see token).