Source : Webster's Revised Unabridged Dictionary (1913)

Discoverable \Dis*cov"er*a*ble\, a.
   Capable of being discovered, found out, or perceived; as,
   many minute animals are discoverable only by the help of the
   microscope; truths discoverable by human industry.

Source : WordNet®

discoverable
     adj : capable of being ascertained or found out; "ascertainable
           facts" [syn: {ascertainable}]