acetenyl
/ˌasɪˈtɛnʌɪl/ /ˌasɪˈtɛn(ɪ)l/ /əˈsɛtɪnʌɪl/Chemistry. Now rare
noun
= ethynyl. Frequently attributive Originally as a formative element in the names of compounds, as acetenylbenzene.
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science. From French acétényle from acet- and -en- (in acétylène) + -yle -yl.