Usually means: Iron oxide residue from sulfuric acid.
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We found 16 dictionaries that define the word colcothar:

General (15 matching dictionaries)
  1. colcothar: Merriam-Webster
  2. colcothar: American Heritage Dictionary of the English Language
  3. colcothar: Collins English Dictionary
  4. colcothar: Wordnik
  5. colcothar: Wiktionary
  6. colcothar: Webster's New World College Dictionary, 4th Ed.
  7. colcothar: Infoplease Dictionary
  8. Colcothar, colcothar: Dictionary.com
  9. Colcothar: Wikipedia, the Free Encyclopedia
  10. Colcothar: Online Plain Text English Dictionary
  11. colcothar: Webster's Revised Unabridged, 1913 Edition
  12. Colcothar: AllWords.com Multi-Lingual Dictionary
  13. colcothar: Webster's 1828 Dictionary
  14. colcothar: FreeDictionary.org
  15. colcothar: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. colcothar: Encyclopedia

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Definitions from Wiktionary (colcothar)

▸ noun:  (organic chemistry, obsolete) Polishing rouge; a reddish-brown oxide of iron, used in polishing glass, and also as a pigment.

Similar:
colophany, corrole, colchicine, colophony, algocyan, coerulignone, pyrocatechin, colophene, rhodanic acid, tocopheryl, more...

Opposite:
uncolcothar, decolorized iron, iron oxide

Types:
red, more...

Phrases:
salt of colcothar, more...

▸ Words similar to colcothar

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▸ Popular adjectives describing colcothar

▸ Words that often appear near colcothar

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Similar:
colophany, corrole, colchicine, colophony, algocyan, coerulignone, pyrocatechin, colophene, rhodanic acid, tocopheryl, more...

Opposite:
uncolcothar, decolorized iron, iron oxide

Types:
red, more...

Phrases:
salt of colcothar, more...



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