Source : Webster's Revised Unabridged Dictionary (1913)

Washable \Wash"a*ble\, a.
   Capable of being washed without damage to fabric or color.

Source : WordNet®

washable
     adj : capable of being washed without injury; "washable woolens";
           "acrylic blankets are both warm and washable" [ant: {nonwashable}]