/ Dictionary / Index R reverse transcriptase: Meaning and Definition of Find definitions for: reverse' tran•scrip'tase Pronunciation: (tran-skrip'tās, -tāz), [key] — Biochem. Biochem. a retrovirus enzyme that synthesizes DNA from viral RNA, the reverse of the usual DNA-to-RNA replication: used in genetic engineering to clone genes from RNA strands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reverse snob reverse video Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language