tet·​ra·​meth·​yl·​lead ˌte-trə-ˌme-thəl-ˈled How to pronounce tetramethyllead (audio)
: a volatile poisonous liquid Pb(CH3)4 used especially formerly as an antiknock agent

Word History

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of tetramethyllead was in 1964

Dictionary Entries Near tetramethyllead

Cite this Entry

“Tetramethyllead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tetramethyllead. Accessed 27 May. 2024.

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