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.

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 UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for colcothar

The wooden disc is also employed for this purpose with putty, colcothar, or washed tripoli.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
When this Colcothar hath undergone a violent fire, as in the experiment now related, scarce any Acid remains therein.
Elements of the Theory and Practice of Chymistry, 5th ed.|Pierre Joseph Macquer
When the cork or wooden disc edged with hat felt is used for polishing, putty or colcothar is applied to it.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
Emery with oil is used for grinding down, and tin-putty or colcothar for polishing.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

A factitious article is prepared by calcining a mixture of colcothar and red ochre.
Cooley's Practical Receipts, Volume II|Arnold Cooley

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

单词	colcothar
释义	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. 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 UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for colcothar The wooden disc is also employed for this purpose with putty, colcothar, or washed tripoli. A Dictionary of Arts, Manufactures and Mines\|Andrew Ure When this Colcothar hath undergone a violent fire, as in the experiment now related, scarce any Acid remains therein. Elements of the Theory and Practice of Chymistry, 5th ed.\|Pierre Joseph Macquer When the cork or wooden disc edged with hat felt is used for polishing, putty or colcothar is applied to it. A Dictionary of Arts, Manufactures and Mines\|Andrew Ure Emery with oil is used for grinding down, and tin-putty or colcothar for polishing. A Dictionary of Arts, Manufactures and Mines\|Andrew Ure A factitious article is prepared by calcining a mixture of colcothar and red ochre. Cooley's Practical Receipts, Volume II\|Arnold Cooley 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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