v. t. 1. To distinguish or mark by a specific difference; to effect a difference in, as regards classification; to develop differential characteristics in; to specialize; to desynonymize. [ 1913 Webster ]

The word then was differentiated into the two forms then and than. Earle. [ 1913 Webster ]

Two or more of the forms assumed by the same original word become differentiated in signification. Dr. Murray. [ 1913 Webster ]

2. To express the specific difference of; to describe the properties of (a thing) whereby it is differenced from another of the same class; to discriminate. Earle. [ 1913 Webster ]

3. (Math.) To obtain the differential, or differential coefficient, of; as, to differentiate an algebraic expression, or an equation. [ 1913 Webster ]

v. i. (Biol.) To acquire a distinct and separate character. Huxley. [ 1913 Webster ]

adj. 1. made different (especially in the course of development) or shown to be different; as, the differentiated markings of butterflies; the regionally differentiated results. Opposite of undifferentiated. [ WordNet 1.5 ]

2. (Biol.) exhibiting biological specialization; adapted during development to a specific function or environment; as, differentiated cells. [ WordNet 1.5 ]