/ Dictionary / Index S synthetase: Meaning and Definition of Find definitions for: syn•the•tase Pronunciation: (sin'thu-tās", -tāz"), [key] — n. Biochem. ligase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. synthesizer synthetic Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language