tetramethyllead
noun
tet·ra·meth·yl·lead
ˌte-trə-ˌme-thəl-ˈled 
: a volatile poisonous liquid Pb(CH3)4 used especially formerly as an antiknock agent
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“Tetramethyllead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tetramethyllead. Accessed 18 Dec. 2024.
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