氢化氰 qīnghuàqíng hydrogen cyanide Origin Definitions Defs Strokes Stroke Words Sentences Sents 氢化 氫化 qīnghuà hydrogenation the chemical process of adding hydrogen to a compound氰 qíng cyanogen (bound form) cyanogen; dicyanogen; a colorless, pungent, and highly toxic gas composed of carbon and nitrogen