Source : Webster's Revised Unabridged Dictionary (1913)

Explainable \Ex*plain"a*ble\, a. [L. explainabilis.]
   Capable of being explained or made plain to the
   understanding; capable of being interpreted. --Sir. T.
   Browne.

Source : WordNet®

explainable
     adj : capable of being understood; "explainable phenomena" [syn: {interpretable}]