ethylene ethylation • ethylenediamine · · · Info · Definitions · Synonyms · Characters · · ethylene · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic. Synonyms: ethene. · · Noun Definition 1 Synonyms · · · ethene · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C n latin small letter n U+006E t latin small letter t U+0074 y latin small letter y U+0079