differentiable

adjective2

1. •
   able to be differentiated; distinguishable, as for example by differing appearance or measurable characteristics.

   • 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. •
   Having a derivative, said of a function whose domain and codomain are manifolds.

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