/ Dictionary / Index P plasma thromboplastic component: Meaning and Definition of Find definitions for: plas'ma thromboplas'tic compo"nent Pronunciation: [key] — Biochem. Biochem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plasmasphere plasmid Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language