Meanings of tetraethyl lead in английском

A chemist delivered a small amount of tetraethyl lead, or TEL, on the morning of Dec. 9.

Five years earlier, a chemical engineer working for General Motors had discovered that tetraethyl lead cured a stubborn knocking problem in the car engines.

David Turner, a former sales and marketing director for tetraethyl lead, pleaded guilty at Southwark Crown Court on Jan. 17 and is awaiting sentencing.

Tetraethyl lead was nothing new back then; it was actually a 19th century discovery from European laboratories.