butter yellow noun 2adjective 1forms 3 noun2 •A light, soft yellow colour. •An azo dye with the formula C₆H₅N₂C₆H₄N(CH₃)₂, used as a food additive in butter and margarine before its toxicity was recognized. adjective1 •Having a light, soft yellow colour. formsbutter yellows · more butter yellow · most butter yellow
