Wiktionary
triethylgallium
n. (context organic compound English) The organometallic compound, (CH3CH2)3Ga, used in vapour-phase epitaxy for the manufacture of semiconductors
Wikipedia
Triethylgallium
Triethylgallium, Ga(CH), or TEGa, is a metalorganic source of gallium for metalorganic vapour phase epitaxy (MOVPE) of compound semiconductors.