/ Thesaurus / P Synonyms of parietal pericardium Find synonyms for: Noun1. parietal pericardium, serous membrane, serosausage: the tough outermost layer of the pericardium that is attached to the diaphragm and the sternumWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language