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say it: soo-pur-AHK-sahyd
superoxide is a noun meaning "a metallic oxide containing the univalent anion O2-". It carries 2 recorded senses.
a metallic oxide containing the univalent anion O2-
the univalent anion O2-
“much of the O2 supporting cellular respiration is reduced to the superoxide anion O2-”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for superoxide come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.