Source : Webster's Revised Unabridged Dictionary (1913)

Falsifiable \Fal"si*fi`a*ble\, a. [Cf. OF. falsifiable.]
   Capable of being falsified, counterfeited, or corrupted.
   --Johnson.

Source : WordNet®

falsifiable
     adj : capable of being tested (verified or falsified) by
           experiment or observation [syn: {confirmable}, {verifiable}]