gas engine

plural gas engines

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.

   The shop was driven by a hiccoughy old gas engine which sometimes packed up, to the great delight of all the juveniles.

   1944 September and October, A Former Pupil, “Some Memories of Crewe Works—I”, in Railway Magazine, page 283

2. CanadaUSAn internal combustion engine that runs on gasoline; especially, a reciprocating one.

   Synonyms: petrol engine