verb (used with object), differentiated, differentiating.
to form or mark differently from other such things; distinguish.
to change; alter.
to perceive the difference in or between.
to make different by modification, as a biological species.
Mathematics. to obtain the differential or the derivative of.
verb (used without object), differentiated, differentiating.
to become unlike or dissimilar; change in character.
to make a distinction.
Biology. (of cells or tissues) to change from relatively generalized to specialized kinds, during development.

1810–20; < Medieval Latin differentiātus distinguished (past participle of differentiāre), equivalent to Latin different(ia) difference + -ātus -ate1

differentiation, noun
interdifferentiate, verb (used with object), interdifferentiated, interdifferentiating.
redifferentiate, verb, redifferentiated, redifferentiating.
self-differentiating, adjective
undifferentiated, adjective

1. set off. See distinguish. 3. separate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
differentiate (ˌdɪfəˈrɛnʃɪˌeɪt)
vb (when intr, often foll by between)
1.  (tr) to serve to distinguish between
2.  to perceive, show, or make a difference (in or between); discriminate
3.  (intr) to become dissimilar or distinct
4.  maths to perform a differentiation on (a quantity, expression, etc)
5.  (intr) (of unspecialized cells, etc) to change during development to more specialized forms

undifferentiated (ˌʌndɪfəˈrɛnʃɪˌeɪtɪd)
not having any distinguishing features: an undifferentiated mass

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1862, from un- (1) "not" + pp. of differentiate (see difference).

1816, formed from different on model of Fr. différencier. Originally a mathematical term, trans. and non-technical sense of "discriminate between" is from 1876. Earlier, difference had been used as a verb in this sense. Related: Differentiated; differentiating; differentiation.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

undifferentiated un·dif·fer·en·ti·at·ed (ŭn'dĭf-ə-rěn'shē-ā'tĭd)
Having no special structure or function; primitive; embryonic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
If gravity were only slightly weaker, stars couldn't form and the cosmos would
  be a thin, undifferentiated blur.
Cartels work best when the thing being sold is an undifferentiated commodity.
As for efficiency, research suggests that the more immature and
  undifferentiated a donor cell, the better.
Did you even look to the bottom line of the undifferentiated data on the link
  you provided, that you use to justify your um.
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