/ Dictionary / Index R reverse mutation: Meaning and Definition of Find definitions for: reverse' muta'tion Pronunciation: [key] — Genetics. Genetics. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reverse mortgage reverse osmosis Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language