Breadcrumb Home > Thesaurus > M Synonyms of mediastinum Find synonyms for: Noun 1. mediastinum, cavity, bodily cavity, cavum usage: the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of mediastinum (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