DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   soluble
       adj 1: (of a substance) capable of being dissolved in some
              solvent (usually water) [ant: indissoluble,
              insoluble]
       2: susceptible of solution or of being solved or explained; "the
          puzzle is soluble" [ant: insoluble]