ad ‧ mix ‧ ture /ədˈmɪkstʃə, æd- $ ædˈmɪkstʃər/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Latin ; Origin: admixtus , past participle of admiscere , from ad- 'to' + miscere 'to mix' ]
technical a substance that is added to another substance in a mixture