Breadcrumb Home > Thesaurus > S Synonyms of superoxide Find synonyms for: Noun 1. superoxide, oxide usage: a metallic oxide containing the univalent anion O2- 2. superoxide, superoxide anion, anion usage: the univalent anion O2-; "much of the O2 supporting cellular respiration is reduced to the superoxide anion O2-" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of superoxide (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: aficionado Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language