聚乙烯 jùyǐxī polyethylene Origin Definitions Defs Strokes Stroke Words Sentences Sents 聚 jù poly- (bound form) used in chemistry to indicate a polymer乙烯 yǐxī noun ethylene; ethene a colorless flammable gas (C2H4) derived from petroleum; used as a chemical feedstock for plastics and synthetic fibers, and for welding and cutting metal