过氧化 guòyǎnghuà peroxidation Origin Definitions Defs Strokes Stroke Words Sentences Sents 过 過 guò adverbparticle to exceed to exceed or go beyond a certain limit; to surpass; (bound form) excessive; overly氧化 yǎnghuà noun oxidize; oxidation to combine with oxygen; the chemical process of losing electrons (as in rusting or combustion)