| Noun | 1. | cinnabar - a heavy reddish mineral consisting of mercuric sulfide; the chief source of mercurymineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition | |
| 2. | cinnabar - large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwortarctiid, arctiid moth - stout-bodied broad-winged moth with conspicuously striped or spotted wings; larvae are hairy caterpillars | |
| Adj. | 1. | cinnabar - of a vivid red to reddish-orange colorchromatic - being or having or characterized by hue | |