/ Dictionary / Index R revertant: Meaning and Definition of Find definitions for: re•ver•tant Pronunciation: (ri-vûr'tnt), [key] — Genetics. Genetics.n. a gene, organism, or strain that has undergone a back mutation. —adj. of or pertaining to a gene, organism, or strain that has undergone a back mutation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. revert reverter Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language