'Differentiator' definitions:

Definition of 'differentiator'

From: WordNet
noun
A person who (or that which) differentiates [syn: differentiator, discriminator]

Definition of 'Differentiator'

From: GCIDE
  • Differentiator \Dif`fer*en"ti*a`tor\, n. One who, or that which, differentiates. [1913 Webster]