[noun] [C usually singular] [specialized or formal] - something added to something elsePlatinum combines with phosphorus and arsenic and is seldom found without an admixture of related metals.Our party was composed principally of Japanese and Americans, with an admixture of Hungarians.
ADMIXTURE
Meaning of ADMIXTURE in English
Cambridge English vocab. Кембриджский английский словарь. 2012