cin·na·bar 
(sĭnə-bär′)
(sĭnə-bär′)n.
1. A heavy reddish mercuric sulfide, HgS, that is the principal ore of mercury.
2. See mercuric sulfide.
3. See vermilion.
[Middle English cinabare, from Latin cinnabaris, from Greek kinnabari.]
cin′na·barine (-bärĭn, -īn, -bə-rīn′) adj.