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1 definition found
 for Red orpiment
From The Collaborative International Dictionary of English v.0.48 :

  Orpiment \Or"pi*ment\, n. [F., fr. L. auripigmentum; aurum gold
     + pigmentum pigment. Cf. Aureate, Pigment, Orpin,
     Orpine.] (Chem.)
     Arsenic sesquisulphide, produced artificially as an amorphous
     lemon-yellow powder, and occurring naturally as a yellow
     crystalline mineral; -- formerly called auripigment. It is
     used in king's yellow, in white Indian fire, and in certain
     technical processes, as indigo printing.
     [1913 Webster]
  
           Our orpiment and sublimed mercurie.      --Chaucer.
     [1913 Webster]
  
     Red orpiment, realgar; the red sulphide of arsenic.
  
     Yellow orpiment, king's yellow.
        [1913 Webster]

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