tartrazinePronunciation: /ˈtɑːtrəziːn/Definition of tartrazine noun [mass noun] Chemistry a brilliant yellow synthetic dye derived from tartaric acid and used to colour food, drugs, and cosmetics. Origin: late 19th century: from French tartre 'tartar' + azo- + -ine4tartrazine in other Oxford dictionaries Definition of tartrazine in the US English dictionary