superoxide superoxalate • superoxide anion · · · Info · Definitions · Synonyms · Characters · · superoxide · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a metallic oxide containing the univalent anion O2-. · · Noun Definition 1 (noun) the univalent anion O2-. Synonyms: superoxide anion. Example: "Much of the o2 supporting cellular respiration is reduced to the superoxide anion o2-." · · Noun Definition 2 Synonyms · · · superoxide anion · · Synonym 1 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075 x latin small letter x U+0078