The Collaborative International Dictionary of English v.0.48:

Transmutable \Trans*mut"a*ble\, a. [Cf. F. transmutable. See
   Transmute.]
   Capable of being transmuted or changed into a different
   substance, or into into something of a different form a
   nature; transformable.
   [1913 Webster]

         The fluids and solids of an animal body are easily
         transmutable into one another.           --Arbuthnot.
   [1913 Webster] -- Trans*mut"a*ble*ness, n. --
   Trans*mut"a*bly, adv.
   [1913 Webster]