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colcothar

[ kol-kuh-ther ]
/ ˈkɒl kə θər /
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use colcothar in a sentence

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
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