From The Collaborative International Dictionary of English v.0.48:

Cadmium \Cad"mi*um\, n. [NL. See Cadmia.] (Chem.)
   A comparatively rare element related to zinc, and occurring
   in some zinc ores. It is a white metal, both ductile and
   malleable. Symbol Cd. Atomic weight 111.8. It was discovered
   by Stromeyer in 1817, who named it from its association with
   zinc or zinc ore.
   [1913 Webster]

   Cadmium yellow, a compound of cadmium and sulphur, of an
      intense yellow color, used as a pigment.
      [1913 Webster]
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