/ Dictionary / Index T thromboplastic: Meaning and Definition of Find definitions for: throm•bo•plas•tic Pronunciation: (throm"bu-plas'tik), [key] — adj. Biochem. causing or accelerating blood-clot formation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thrombophlebitis thromboplastin Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language