orpiment

2 definitions found

orpiment - 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]

orpiment - WordNet (r) 2.1 (2005) :

  orpiment
      n 1: a yellow mineral occurring in conjunction with realgar; an
           ore of arsenic