过氧化氢 guòyǎnghuàqīng hydrogen peroxide Origin Definitions Defs Strokes Stroke Words Sentences Sents 过氧化 過氧化 guòyǎnghuà peroxidation peroxidation; to oxidize at a higher level than a normal oxide氢 氫 qīng noun hydrogen the chemical element hydrogen, a colorless, odorless, and tasteless gas that is the lightest of all known substances; usually referred to as 氢气 qīngqì