acetylenePronunciation: /əˈsɛtɪliːn/Definition of acetylene noun Chemistry a colourless pungent-smelling hydrocarbon gas, which burns with a bright flame, used in welding and formerly in lighting. Alternative name: ethyne; chemical formula: C2H2 Origin: mid 19th century: from acetic acid + -yl + -eneacetylene in other Oxford dictionaries Definition of acetylene in the US English dictionary
