superoxide

noun

su·​per·​ox·​ide ˌsü-pər-ˈäk-ˌsīd How to pronounce superoxide (audio)
: the monovalent anion O2 or a compound containing it
potassium superoxide KO2

Word History

First Known Use

1807, in the meaning defined above

Time Traveler
The first known use of superoxide was in 1807

Dictionary Entries Near superoxide

Cite this Entry

“Superoxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superoxide. Accessed 26 Nov. 2022.

Medical Definition

superoxide

noun

su·​per·​ox·​ide -ˈäk-ˌsīd How to pronounce superoxide (audio)
: any of various toxic oxygen-containing free radicals
especially : the monovalent anion O2 or a compound containing it
potassium superoxide KO2

More from Merriam-Webster on superoxide

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