- - Unsaturated hydrocarbon with at least one double carbon-carbon bond
- - Hydrocarbon with one double bond
- - Unsaturated hydrocarbon
- - Certain hydrocarbon
- - Unsaturated hydrocarbon with a double bond
- - hydrocarbon with a double bond
- - Olefin
- - Ethylene, for one
- - Ethylene or propylene
- - Compound also called an olefin
- - C4H8, e.g.
- - C2H4, e.g.
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