pol|y|phen|yl|ene oxide

pol|y|phen|yl|ene oxide «_POL ee FEHN uh leen, -FEE nuh-»,

a thermoplastic substance that is highly resistant to acids, bases, and detergents, derived by oxidative polymerization of xylenol and used for making nose cones, dielectric components, and laboratory and industrial equipment. Abbr: PPO (no periods).