Dictionary![]() ![]() pol•y•pro•pyl•enePronunciation: (pol"ē-prō'pu-lēn"), [key] —n. Chem. a plastic polymer of propylene, (C3H5)n, used chiefly for molded parts, electrical insulation, packaging, and fibers for wearing apparel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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