differentiable

from WordNet (r) 3.0 (2006)

differentiable
    adj 1: possessing a differential coefficient or derivative
    2: capable of being perceived as different; "differentiable
       species"

from The Collaborative International Dictionary of English v.0.48

differentiable \differentiable\ adj.
   1. (Math.) possessing a differential coefficient or
      derivative; -- of a mathematical expression.
      [WordNet 1.5]

   2. capable of being perceived as different; as,
      differentiable species.
      [WordNet 1.5]