氮烯 dànxī nitrene Origin Definitions Defs Strokes Stroke Words Sentences Sents 氮 dàn noun nitrogen the nonmetallic chemical element with symbol N; a colorless, odorless gas that makes up about four-fifths of the earth's atmosphere烯 xī noun alkene (bound form) alkene; olefin; a class of unsaturated hydrocarbons containing carbon-carbon double bonds