/ Dictionary / Index C cinnabar: Meaning and Definition of Find definitions for: cin•na•bar Pronunciation: (sin'u-bär"), [key] — n. a mineral, mercuric sulfide, HgS, occurring in red crystals or masses: the principal ore of mercury. red mercuric sulfide, used as a pigment. bright red; vermillion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cinnabar (Thesaurus) cingulum cinnamene Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language