/ Dictionary / Index T transcriptase: Meaning and Definition of Find definitions for: tran•scrip•tase Pronunciation: (tran-skrip'tās, -tāz), [key] — n. Biochem. See RNA polymerase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: transcriptase (Thesaurus) transcript transcription Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language