/ Dictionary / Index R reductivism: Meaning and Definition of Find definitions for: re•duc•tiv•ism Pronunciation: (ri-duk'tu-viz"um), [key] — n. reductionism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reductivism (Thesaurus) reductive reductor Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language