colcothar definition

  • noun:
    • A brownish-red ferric oxide acquired as a residue after warming ferrous sulfate, found in cup polishing and also as a pigment.
    • Polishing rouge; a reddish-brown oxide of metal, used in polishing glass, and in addition as a pigment; crocus Martis.
    • Polishing rouge; a reddish brown oxide of metal, found in polishing glass, and in addition as a pigment; -- labeled as also crocus Martis.
    • The brownish-red peroxid of iron which remains after the distillation associated with the acid from iron sulphate.
    • A brownish-red ferric oxide gotten as a residue after warming ferrous sulfate, found in cup polishing and also as a pigment.
    • Polishing rouge; a reddish-brown oxide of metal, found in polishing glass, and as a pigment; crocus Martis.
    • Polishing rouge; a reddish brown oxide of metal, utilized in polishing glass, also as a pigment; -- labeled as in addition crocus Martis.
    • The brownish-red peroxid of iron which remains after the distillation associated with acid from iron sulphate.

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