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tet·ra·eth·yl leadalso tet·ra·eth·yl·lead (tĕt′rə-ĕth′əl-lĕd′)
A colorless, poisonous, oily liquid, C8H20Pb, comprised of four ethyl groups on each lead atom, used in gasoline for internal-combustion engines as an antiknock agent.
tetraethyl lead(ˌtɛtrəˈiːθaɪl lɛd) or
(Elements & Compounds) a colourless oily insoluble liquid formerly used in petrol to prevent knocking. Its use has been banned in most developed countries due to its toxicity. Formula: Pb(C2H5)4. Systematic name: lead tetraethyl Former names: tetramethyl lead or tetramethyllead