Is “Admixture” a Scrabble word?
Yes
ADMIXTURE
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 Admixture
/ædˈmɪkstʃə(ɹ)/
noun
1.An instance of admixing, a mixing in of something.
“The admixture of vanilla extract in the dough improved the pastries' flavor.”
2.A mixture, in some contexts