Source : Webster's Revised Unabridged Dictionary (1913)

Evaporable \E*vap"o*ra*ble\, a.
   Capable of being converted into vapor, or dissipated by
   evaporation.

Source : WordNet®

evaporable
     adj : used of substances [syn: {vaporific}, {vaporizable}, {volatilizable},
            {volatilisable}]