colcothar


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

colcothar

[′käl·kə‚thär]
(inorganic chemistry)
Red ferric oxide made by heating ferrous sulfate in the air; used as a pigment and as an abrasive in polishing glass.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.