admix definition by Webster's New World
Origin: back-formation , by analogy with mix ; from admixt, mixed with ; from Classical Latin admixtus: see admixture
admix definition by American Heritage Dictionary
tr. & intr.v. ad·mixed, ad·mix·ing, ad·mix·es
Origin: Back-formation from obsolete admixt, mixed into, from Middle English, from Latin admixtus, past participle of admiscēre, to mix into : ad-, ad- + miscēre, to mix; see meik- in Indo-European roots.