v. 1 tr. constitute a difference between or in. 2 tr. & (often foll. by between) intr. find differences (between); discriminate. 3 tr. & intr. make or become different in the process of growth or development (species, word-forms, etc.). 4 tr. Math. transform (a function) into its derivative. differentiation n. differentiator n.
[ med.L differentiare differentiat- (as DIFFERENCE) ]