Source : Webster's Revised Unabridged Dictionary (1913)

Determinable \De*ter"mi*na*ble\, a. [L. determinabilis finite.
   See {Determine}, v. t.]
   Capable of being determined, definitely ascertained, decided
   upon, or brought to a conclusion.

         Not wholly determinable from the grammatical use of the
         words.                                   --South.

Source : WordNet®

determinable
     adj : capable of being determined or limited or fixed;
           "determinable velocities"; "matters determinable by
           law" [ant: {indeterminable}]