Webster's Online Dictionary
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Definition: COLCOTHAR

Part of Speech Definition
Noun 1. Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Colcothar" was first used in popular English literature: sometime before 1828. (references)

Specialty Definition: COLCOTHAR

Domain Definition
Noah Webster [Noun] The brown red oxyd of iron which remains after the distillation of the acid from sulphate of iron; used for polishing glass and other substances. It is called by artists crocus, or crocus martis. The sulphate of iron is called colcothar or chalcite, when the calcination has been carried so far as to drive off a considerable part of the acid. Source: Webster's 1828 American Dictionary.

Source: compiled by the editor from various references; see credits.

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Common Expressions: COLCOTHAR

Expressions Definition
Salt of colcothar (Old Chem.), green vitriol, or sulphate of iron. Source: Webster's Revised Unabridged Dictionary.

Source: compiled by the editor from various references; see credits.

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Definition: COLCOTHAR

Part of SpeechDefinition
Noun1. Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "COLCOTHAR" was first used in popular English literature: sometime before 1828. (references)

Specialty Definition: COLCOTHAR

DomainDefinition
Noah Webster [Noun] The brown red oxyd of iron which remains after the distillation of the acid from sulphate of iron; used for polishing glass and other substances. It is called by artists crocus, or crocus martis. The sulphate of iron is called colcothar or chalcite, when the calcination has been carried so far as to drive off a considerable part of the acid. Source: Webster's 1828 American Dictionary.

Source: compiled by the editor from various references; see credits.

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