vanillic acid

noun
va·​nil·​lic acid | \ və-ˌnil-ik- How to pronounce vanillic acid (audio) \

Medical Definition of vanillic acid

: an odorless crystalline phenolic acid C8H8O4 found in some varieties of vanilla, formed by oxidation of vanillin, and used chiefly in the form of esters as food preservatives

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