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[pol-ee-proh-puh-leen] /ˌpɒl iˈproʊ pəˌlin/
noun, Chemistry
a plastic polymer of propylene, (C 3 H 5) n , used chiefly for molded parts, electrical insulation, packaging, and fibers for wearing apparel.
1930-35; poly- + propylene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for polypropylene
  • polypropylene however, is destroyed simply by burning, because its calorific capacity is similar to that of oil.
  • polypropylene housing is light, but may not last forever.
  • These are mainly polyethylene but also include some types of polypropylene.
  • Then he started tinkering with a polypropylene box, about the size of a laundry basket.
  • Now some reusable bags made from non woven polypropylene with silk is also a good selection.
  • The price of polypropylene, a versatile polymer, is soaring.
  • polypropylene, the more rigid cousin of polyethylene, is an even more fertile field for metallocene improvements.
  • Today, surgeons often prefer plastics such as polypropylene.
  • polypropylene long underwear can keep you warm, even when your body gets wet.
  • Spring visitors should pack long shorts as well as warm pants, storm gear and a layer of polypropylene to keep off chilling winds.
British Dictionary definitions for polypropylene


any of various tough flexible synthetic thermoplastic materials made by polymerizing propylene and used for making moulded articles, laminates, bottles, pipes, and fibres for ropes, bristles, upholstery, and carpets Systematic name polypropene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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polypropylene in Science
  1. Any of various thermoplastic resins that are polymers consisting of repeated branched units derived from propane and having the formula CH2CH(CH3), usually with the methane groups (CH3) all on one side of the chain. Polypropylenes are similar to polyethylenes but are harder and tougher and are used to make molded articles and fibers.

  2. A fabric of fibers made from any of these resins.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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