Breadcrumb Home > Thesaurus > P Synonyms of peritoneum Find synonyms for: Noun 1. peritoneum, serous membrane, serosa usage: a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of peritoneum (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: felicitous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language