-
Propylene (noun)
The organic chemical compound propene. An alkene which is a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C3H6.
-
Polyallomer (noun)
A copolymer of more than one olefin, especially of propylene and another olefin
Wiktionary
-
Polyallomer (noun)
Any of a class of crystalline thermoplastics which are copolymers of two or more different alkenes, especially ethylene and propylene.
Oxford Dictionary