Definition of vanillin noun from the Oxford Advanced Learner's Dictionary

 

vanillin

 noun
noun
BrE BrE//vəˈnɪlɪn//
 
; NAmE NAmE//vəˈnɪlɪn//
 
[uncountable]
 
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a strong-smelling chemical which gives vanilla its smell Word Origin mid 19th cent.; from vanilla + -in.
See the Oxford Advanced American Dictionary entry: vanillin