1. (Min.) Red sulphide of mercury, occurring in brilliant red crystals, and also in red or brown amorphous masses. It is used in medicine. 2. The artificial red sulphide of mercury used as a pigment; vermilion. Cinnabar Græcorum (. Etym: [L. Graecorum, gen. pl., of the Greeks.] (Med.) Same as Dragon's blood. -- Green cinnabar, a green pigment consisting of the oxides of cobalt...
