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(ˈtɛ trəˌmɛθ əlˈlɛd)

a colorless liquid, (CH3)4Pb, used as an antiknock agent in gasoline.
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References in periodicals archive ?
Thus, the reversible formation of methyl radicals and elemental lead from tetramethyllead (eq 2) was convincingly demonstrated, and this technique was quickly exploited by other chemists in Europe and North America.