a ‧ cet ‧ y ‧ lene /əˈsetəliːn, əˈsetɪliːn $ -tl-ən, -iːn/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Origin: acetyl chemical group (19-21 centuries) , from acet- ; ACETAMINOPHEN ]
a gas which burns with a bright flame and is used in equipment for cutting and joining pieces of metal ⇨ oxyacetylene