colcothar
(noun)
noun
1. (organic chemistry, obsolete) Polishing rouge; a reddish-brown oxide of iron, used in polishing glass, and also as a pigment; crocus Martis.
(noun)
1. (organic chemistry, obsolete) Polishing rouge; a reddish-brown oxide of iron, used in polishing glass, and also as a pigment; crocus Martis.