/ Dictionary / Index A antiderivative: Meaning and Definition of Find definitions for: an•ti•de•riv•a•tive Pronunciation: (an"tē-du-riv'u-tiv, an"tī-), [key] — n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antidepressant antidesiccant Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language