Ethyl
From Freepedia
Ethyl is a two-carbon substituent in organic chemistry. -CH2CH3 (very often abbreviated: -Et). It is an alkyl.
"Ethyl" was also the common designation in North America for high-performance commercial gasoline containing Lead in the mid 20th century. The term comes from the name of the company, Ethyl Corporation, which manufactured the antiknock organometallic agent tetraethyl lead added to the gasoline.
