/ Dictionary / Index C cinnamic acid: Meaning and Definition of Find definitions for: cinnam'ic ac'id Pronunciation: [key] — Chem. Chem. a white, crystalline, water-insoluble powder, CHO, usually obtained from cinnamon or synthesized: used chiefly in the manufacture of perfumes and medicines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cinnamic cinnamic alcohol Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language