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colcothar

[ kol-kuh-ther ]
/ ˈkɒl kə θər /

noun Chemistry.

the brownish-red oxide of iron produced by heating ferrous sulfate: used chiefly as a pigment in paints and theatrical rouge, and as a polishing agent.

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Also called jewelers' rouge.

Origin of colcothar

1595–1605; <Medieval Latin <Old Spanish colcotar,Spanish Arabic qulquṭār, perhaps <Greek chálkanthos copper sulfate solution

Words nearby colcothar

colcannon, Colchester, colchicine, colchicum, Colchis, colcothar, cold, cold abscess, cold agglutination, cold agglutinin, cold-blooded
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for colcothar

British Dictionary definitions for colcothar

colcothar
/ (ˈkɒlkəˌθɑː) /

noun

a finely powdered form of ferric oxide produced by heating ferric sulphate and used as a pigment and as jewellers' rougeAlso called: crocus

Word Origin for colcothar

C17: from French colcotar, from Spanish colcótar, from Arabic dialect qulqutār
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012