/ Dictionary / Index D dedifferentiation: Meaning and Definition of Find definitions for: de•dif•fer•en•ti•a•tion Pronunciation: (dē-dif"u-ren"shē-ā'shun), [key] — n. Biol. a process by which structures or behaviors that were specialized for a specific function lose their specialization and become simplified or generalized. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dedifferentiation (Thesaurus) dedifferentiate de d in d Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language