tetraethyllead

or tet·raeth·yl lead

[te-truh-eth-uh l-led]

noun Chemistry.

a colorless, oily, water-insoluble, poisonous liquid, (C2H5)4Pb, used as an antiknock agent in gasoline.

Origin of tetraethyllead

First recorded in 1920–25; tetraethyl + lead²

Also called lead tetraethyl, TEL

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018