gas motor1
/ˈɡas məʊtə/noun
A motor driven by the production, expansion, or combustion of gas.
Origin
Mid 19th century; earliest use found in Scientific American. From gas + motor.
gas motor2
/ˈɡas ˌməʊtə/Chiefly US
noun
= gas engine.
Origin
Early 20th century; earliest use found in The Waterloo Daily Courier. From gas + motor.