acetylene

1. (countable)Any organic compound having one or more carbon–carbon triple bonds; an alkyne.

   Acetylen, Azetylen

   ацетиле́нacetilén

   ацетиле́нacetylén

2. (uncountable)Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless, odourless, extremely flammable, explosive gas, formerly used as an illuminating gas, but now used in welding and metallurgy.

   a colorless flammable gas used chiefly in welding and in organic synthesis

3. (countable, uncountable)A lamp powered by acetylene, particularly a motor vehicle headlight.

1. Thankfully, electrical lighting has virtually eliminated the need for acetylene headlamps.

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2. Cassini's atmospheric sensing instruments have revealed other carbon compounds, too, such as benzene and acetylene.

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3. I don't always have access to electricity, so I use a portable acetylene torch for welding.

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