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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 or·pi·ment /ˈɔrpəmənt/
 雌黃

From: Webster's Revised Unabridged Dictionary (1913)

 Or·pi·ment n.  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.
    Our orpiment and sublimed mercurie.   --Chaucer.
 Red orpiment, realgar; the red sulphide of arsenic.
 Yellow orpiment, king's yellow.
 

From: WordNet (r) 2.0

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