Definition of colcothars Colcothars
We found 2 definitions of colcothars from 1 different sources.
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What does colcothars mean?
Wiktionary 
- colcothars (Noun)
Plural of colcothar.
Wiktionary
Webster DictionaryWebster's Unabridged Dictionary 📘
- colcothar (n.)
Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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colcothar
kol′kō-thar, n. a dark-red iron peroxide formed by calcining copperas
