amalgam  
noun uk/əˈmæl.ɡəm/ us/əˈmæl.ɡəm/
  (OF METALS)      
  [ U ] chemistry, medical specialized(尤指牙医用来补牙的)汞合金,汞齐 
a mixture of mercury and another metal, especially one used by dentists to repair teeth
  an amalgam filling 汞合金补牙填充料 
   (OF PARTS)      
 [ S ]混合物;综合体 
a combination of parts that create a complete whole
  The show was a wonderful amalgam of dance, music, and drama. 这场表演出神入化地将舞蹈、音乐和戏剧融为一体。 
 Nearly every new parent feels an amalgam of joy and terror. 几乎每一个初为父母的人都会感到既喜悦又恐惧。