/ Thesaurus / P Synonyms of plasma thromboplastin antecedent Find synonyms for: Noun1. plasma thromboplastin antecedent, factor XI, coagulation factor, clotting factorusage: coagulation factor whose deficiency results in a hemorrhagic tendencyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language