Dictionary

superoxide

noun su·per·ox·ide \-ˈäk-ˌsīd\

Definition of SUPEROXIDE

:  the monovalent anion O2 or a compound containing it <potassium superoxide KO2>
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First Known Use of SUPEROXIDE

circa 1847
Medical Dictionary

superoxide

noun su·per·ox·ide \-ˈäk-ˌsīd\

Medical Definition of SUPEROXIDE

:  any of various toxic oxygen-containing free radicals; especially :  the monovalent anion O2 or a compound containing it <potassium superoxide KO2>

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