ETHYLENE Meaning of ETHYLENE in English [ 'ɛθɪli:n , -θ(ə)l- ]■ noun Chemistry a flammable hydrocarbon gas of the alkene series, occurring in natural gas and coal gas; ethene. [C 2 H 4 .] Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004