氢氧根 qīngyǎnggēn hydroxide Origin Definitions Defs Strokes Stroke Words Sentences Sents 氢氧 氫氧 qīngyǎng oxyhydrogen a mixture of hydrogen and oxygen gas, typically in a ratio of 2:1, used in high-temperature torches for welding and cutting根 gēn radical (chemistry) (chemistry) a group of atoms that behave as a single unit; a radical