superoxide

noun su·per·ox·ide \ ˌsü-pər-ˈäk-ˌsīd \

Definition of superoxide

: the monovalent anion O2 or a compound containing it
  • potassium superoxide KO2

First Known Use of superoxide

1807

in the meaning defined above

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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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