Breadcrumb Home > Thesaurus > R Synonyms of radiopaque Find synonyms for: Adjective 1. radiopaque (vs. radiolucent), radio-opaque usage: not transparent to X-rays or other forms of radiation; "barium sulfate is radiopaque" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of radiopaque (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language