氢氧根离子 qīngyǎnggēnlízǐ hydroxide ion Origin Definitions Defs Strokes Stroke Words Sentences Sents 氢氧根 氫氧根 qīngyǎnggēn hydroxide the hydroxide radical or hydroxyl group (-OH) consisting of one oxygen atom and one hydrogen atom离子 離子 lízǐ noun ion An atom or group of atoms that has gained or lost one or more electrons and thus carries an electrical charge.