Definition of acetylene noun from the Oxford Advanced Learner's Dictionary

 

acetylene

 noun
noun
BrE BrE//əˈsetəliːn//
 
; NAmE NAmE//əˈsetəliːn//
 
(also ethyne)[uncountable](symbol C2H2)
 
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a gas that burns with a very hot bright flame, used for cutting or joining metal Word Origin mid 19th cent.: from acetic acid + -yl + -ene.
See the Oxford Advanced American Dictionary entry: acetylene