Origin: Greek prefix poly-
Polypropylene has 2 different meanings across 1 category:
a polymer of propylene used as a thermoplastic molding material
"The manufacturer switched to polypropylene for the new car parts because its durability as a thermoplastic molding material made it perfect for high-stress areas."
A thermoplastic resin made by the polymerization of propylene, and used for films, fibres, or moulding materials. Also known as polypropene.
"The recycling center sorted the food storage containers into a bin labeled for polypropylene because they were made from that specific type of thermoplastic resin."