differentiatable

adjective2

1. •
   That can be differentiated; that can be distinguished.

   • It would, in that case, have been as real as it now is, and would have been differentiable from its Maker as an effect is differentiable from its cause. — 1890
2. •
   For which a derivative or differential can be calculated.

   • A function which is differentiable wherever it is continuous is said to possess ordinary continuity. — 1896