Col"co*thar (?), n. [NL. colcothar vitrioli, fr. Ar. qolqotar.] Chem.
Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.
© Webster 1913.
Log in or register to write something here or to contact authors.
Need help? firstname.lastname@example.org