Read Edit View history 丁二烯 dīng'èrxī butadiene Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 丁二烯 · dīng'èrxī · butadiene 2026/03/04 丁二烯 dīng'èrxī butadiene a colorless gas used primarily in the production of synthetic rubber, with the chemical formula C4H6; also known as biethylene 丁二烯是制造合成橡胶的重要原料。 noun created sense Mar 4, 2026, 02:25 AM