/ Thesaurus / A Synonyms of aortic valve Find synonyms for: Noun1. aortic valve, semilunar valveusage: a semilunar valve between the left ventricle and the aorta; prevents blood from flowing from the aorta back into the heartWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language