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tetraethyl lead
tetraethyl lead n. 
/ˌtɛtrəɛθʌɪl ˈlɛd/, /ˌtɛtrəɛθᵻl ˈlɛd/,
Brit. /ˌtɛtrəiːθʌɪl ˈlɛd/
, /ˌtɛtrəiːθʌɪl ˈlɛd//ˌtɛtrəɛθʌɪl ˈlɛd//ˌtɛtrəɛθᵻl ˈlɛd/U.S. /ˌtɛtrəˌɛθ(ə)l ˈlɛd/
a poisonous oily liquid, Pb(C2H5)4, which is added to petrol as an anti-knock agent making possible higher compression ratios; = lead tetraethyl n. at lead n.1 Compounds 3b. [Compare French plomb tétraéthyle (1893 or earlier).] /ˌtɛtrəˌɛθ(ə)l ˈlɛd/ΘΚΠ
the world > matter > chemistry > elements and compounds > metals > specific elements > lead > [noun] > compounds > others
litharge of goldc1400
red leadc1450
tetraethyl lead1923
plumbane1950
1923 Jrnl. Amer. Chem. Soc. 45 1821 Tetra-ethyl lead was prepared by P. Pfeiffer by the action of lead chloride on ethyl-magnesium iodide.
1940 Economist 30 Mar. 586/2 The 87-octane spirit is generally obtained by the addition of small quantities of tetra-ethyl lead to good-quality ‘straight-run’ petrol.
1970 Nature 14 Mar. 990/1 Lead, in the form which it is added to petrols—tetraethyl lead, Pb(C2H5)4—is undoubtedly poisonous.
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