/ Thesaurus / A Synonyms of atrial Find synonyms for: Adjective1. atrialusage: of or relating to a cavity or chamber in the body (especially one of the upper chambers of the heart)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language