vanillinPronunciation: /vəˈnɪlɪn/Definition of vanillin noun [mass noun] Chemistry a fragrant compound which is the essential constituent of vanilla. Alternative name: 3-methoxy-4-hydroxybenzaldehyde; chemical formula: CH3OC6H3(OH)CHO Origin: mid 19th century; from vanilla + -in1vanillin in other Oxford dictionaries Definition of vanillin in the US English dictionary
