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Meaning of polyolefin

pol•y•o•le•fin

Pronunciation: (pol"ē-ō'lu-fin), [key]
— n. Chem.
  1. any of a group of thermoplastic, stiff, light, and hard polymers obtained from the polymerization of simple olefins like propylene, used for injection molding, mostly in the automotive and appliance industries.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.