Polytetrafluoroethylene (PTFE), a strong, tough, waxy, nonflammable synthetic resin produced by the polymerization of tetrafluoroethylene.
Known by such trademarks as Teflon, Fluon, Hostaflon, and Polyflon,
PTFE is distinguished by its slippery surface, high melting point, and resistance to attack by almost all chemicals.
These properties have made it familiar to consumers as the coating on nonstick cookware;
it is also fabricated into industrial products, including bearings, pipe liners, and parts for valves and pumps.