Source : Webster's Revised Unabridged Dictionary (1913)

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.

   {Cadmium yellow}, a compound of cadmium and sulphur, of an
      intense yellow color, used as a pigment.

Source : WordNet®

cadmium
     n : a soft bluish-white ductile malleable toxic bivalent
         metallic element; occurs in association with zinc ores
         [syn: {Cd}, {atomic number 48}]