/ Dictionary / Index B back-mutate: Meaning and Definition of Find definitions for: back-mu•tate Pronunciation: (bak'my"tāt), [key] — -tat•ed, -tat•ing. to undergo back mutation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. back molding back mutation Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language