/ Dictionary / Index C cinnamic aldehyde: Meaning and Definition of Find definitions for: cinnam'ic al'dehyde Pronunciation: [key] — Chem. Chem. a yellowish oil, CHO, having a cinnamonlike odor, used chiefly as a scent in the manufacture of flavorings and perfumes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cinnamic alcohol cinnamon Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language