Aviation Dictionary
موتور احتراق خارجی، موتور برون سوز، موتوری همچون موتور لوکوموتیو بخاری که احتراق در بیرون آن صورت میگیرد
A heat engine in which the chemical energy in the fuel is converted into heat energy released to the outside of the engine. Heating water to produce steam that is put to mechanical use is a form of an external combustion engine.