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 ]

n. 1. The act of differentiating. [ 1913 Webster ]

Further investigation of the Sanskrit may lead to differentiation of the meaning of such of these roots as are real roots. J. Peile. [ 1913 Webster ]

2. (Logic) The act of distinguishing or describing a thing, by giving its different, or specific difference; exact definition or determination. [ 1913 Webster ]

3. (Biol.) The gradual formation or production of organs or parts by a process of evolution or development, as when the seed develops the root and the stem, the initial stem develops the leaf, branches, and flower buds; or in animal life, when the germ evolves the digestive and other organs and members, or when the animals as they advance in organization acquire special organs for specific purposes. [ 1913 Webster ]

4. (Metaph.) The supposed act or tendency in being of every kind, whether organic or inorganic, to assume or produce a more complex structure or functions. [ 1913 Webster ]

n. One who, or that which, differentiates. [ 1913 Webster ]

a. Not differentiated; specifically (Biol.), homogenous, or nearly so; -- said especially of young or embryonic tissues which have not yet undergone differentiation (see Differentiation, 3), that is, which show no visible separation into their different structural parts. [ 1913 Webster ]