gas engine

Noun

 * 1) An internal combustion engine that runs on a fuel gas (a gaseous fuel) such as natural gas or producer gas; especially, a reciprocating one, typically a large stationary engine in power plant or industrial use.
 * 2)  An internal combustion engine that runs on gasoline; especially, a reciprocating one.
 * 1)  An internal combustion engine that runs on gasoline; especially, a reciprocating one.