Source : Webster's Revised Unabridged Dictionary (1913)

Dissolubility \Dis`so*lu*bil"i*ty\, n.
   The quality of being dissoluble; capacity of being
   dissoluble; capacity of being dissolved by heat or moisture,
   and converted into a fluid.

Source : WordNet®

dissolubility
     n : the property of being dissoluble; "he measure the
         dissolubility of sugar in water" [syn: {solubleness}]