氢氧 qīngyǎng oxyhydrogen Origin Definitions Defs Strokes Stroke Words Sentences Sents 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氧 yǎng noun oxygen oxygen; a colorless, odorless gas necessary for life and combustion