polytetrafluoroethylene noun. [,pɒlɪtɛtrǝflʊǝrǝʊ'ɛƟɪli:n] M20.
[from POLY- + TETRAFLUOROETHYLENE.]
Chemistry. A polymer of tetrafluoroethylene, esp. a tough crystalline resinous material resistant to chemicals and with a low coefficient of friction, used as a moulding material and as a coating for bearings, non-stick cooking utensils etc. Abbreviation PTFE.

► A proprietary name for this substance is TEFLON.

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