DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   Cs
       n 1: a soft silver-white ductile metallic element (liquid at
            normal temperatures); the most electropositive and alkaline
            metal [syn: cesium, caesium, Cs, atomic number 55]