acriflavinePronunciation: /ˌakrɪˈfleɪvɪn, -iːn/Definition of acriflavine noun [mass noun] a bright orange-red dye derived from acridine, used as an antiseptic. Origin: early 20th century: formed irregularly from acridine + Latin flavus 'yellow' + -ine4acriflavine in other Oxford dictionaries Definition of acriflavine in the US English dictionary