noun (n)

• a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores(noun.substance)

  Synonym:
  atomic number 48, cd
  

  source: wordnet30
• 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.(noun)

  source: webster1913