- a white, crystalline, water-insoluble powder, C9H8O2, usually obtained from cinnamon or synthesized: used chiefly in the manufacture of perfumes and medicines.
- a white crystalline water-insoluble weak organic acid existing in two isomeric forms; 3-phenylpropenoic acid. The trans- form occurs naturally and its esters are used in perfumery. Formula: C 6 H 5 CH:CHCOOH
