n. Chem. a gaseous hydrocarbon of the alkene series, occurring in natural gas and used in the manufacture of polythene. Also called ETHENE.
Usage:
Chem. formula: C2H4
Phrases and idioms:
ethylene glycol Chem. a colourless viscous hygroscopic liquid used as an antifreeze and in the manufacture of polyesters.
Usage:
Chem. formula: C2H6O2.: also called ETHANEDIOL.
Derivatives:
ethylenic adj.