cinnabar

nouns

a heavy reddish mineral consisting of mercuric sulfide; the chief source of mercury
cinnabar
is a type of (narrower)
solid homogeneous inorganic substances occurring in nature having a definite chemical composition
mineral
large red-and-black European moth; larvae feed on leaves of ragwort; introduced into United States to control ragwort
Callimorpha jacobeae, cinnabar, cinnabar moth

adjectives

of a vivid red to reddish-orange color
Chinese-red, cinnabar, vermilion, vermillion