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Webster 1913 Edition

Noun.

(Chem.)

Ethylene; olefiant gas.

See also: éthène

ethene ‎(countable and uncountable, plural ethenes)

(organic chemistry) The official IUPAC name for the organic chemical compound ethylene. The simplest alkene, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C₂H₄
(organic chemistry) Any alkene derived from ethylene

Chemical Structure of Ethene

ethylene — see ethylene