The Collaborative International Dictionary
Diesel \Diesel\, Diesel engine \Die"sel en`gine\ or Diesel motor \Die"sel mo`tor\ (d[=e]"zel). [After Dr. Rudolf Diesel, of Munich, the inventor.] A type of internal-combustion engine in which the air drawn in by the suction stroke is so highly compressed that the heat generated ignites the fuel (usually a heavy oil), the fuel being automatically sprayed into the cylinder under pressure. The Diesel engine has a very high thermal efficiency.
Wiktionary
n. diesel engine
WordNet
n. an internal-combustion engine that burns heavy oil [syn: diesel, diesel engine]
Wikipedia
Usage examples of "diesel motor".
For the second time that night, he heard the sound of a heavy diesel motor outside, for the second time that night he switched off the light, pulled the curtains, opened the window and looked out.
Nichols' pick-up has a diesel motor, according to his brother, and Nichols' had been a regular diesel customer for over two months prior to the bombing, according to Shan Woods of Klepper Oil Co.
It had taken perhaps one minute, then, to get up into the cab and begin warming the diesel motor.
It came to a stop, the diesel motor idling while a cab door slammed.
They were puttering with the Diesel motor, having trouble getting it going.
The latter now arrived by X-wing airbus instead of the diesel motor coaches of my day.
The diesel motor chugged bronchially and gasped as it was turned off.
But it is not feasible to convert a truck into an airplane or vice versa, because a truck is committed to truckhood in too many respects: heavy body, diesel motor, braking system, axles, and so on.
I could hear the deep growl of a diesel motor, some piece of machinery picking up speed as it advanced.