noun

1. A deep red mineral, mercuric sulfide, HgS; the principal ore of mercury; such ore used as the pigment vermilion.

2. A bright red colour tinted with orange.

3. A species of moth, Tyria jacobaeae, having red patches on its predominantly black wings.

Synonyms: cinnabar moth, æthiops mineral

adjective

1. Of a bright red colour tinted with orange.