1Of cinnamon.

1. 1.1 Denoting an acidic crystalline powder (cinnamic acid), C₉H₈O₂, derived from cinnamon or produced synthetically and used in medicine and perfumery.
   Example sentencesExamples

   • In the study, a series of benzoic and cinnamic acids were tested.
   • Non-flavinoid compounds are derived from cinnamic and benzoic acids.
   • Propolis has been reported to contain cinnamic acid.
   • The Perkin reaction is a chemical reaction that is used to make cinnamic acids, a derivative of cinnamon.
   • A number of solid amine and diamine salts of cinnamic acids 2 were photochemically isomerized in low yields.