ethenen. 乙烯1、2-亞乙基學術名詞乙烯：高中化學、畜牧學、電機工程、礦冶工程、化學工程、電子工程次乙基：植物學英文釋義a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic