What is another word for external-combustion engine?
Pronunciation: [ɛkstˈɜːnə͡lkəmbˈʌst͡ʃən ˈɛnd͡ʒɪn] (IPA) 
An external-combustion engine is a type of heat engine that burns fuel outside the engine in order to produce steam that powers the engine. This type of engine is also known as a "external combustion motor" or "external heat engine." Other synonyms for this term include "external combustion generator," "Stirling engine," and "hot air engine." While not as commonly used as internal combustion engines, external combustion engines have been used in a variety of applications, including powering locomotives and early automobiles. Today, they are primarily used in stationary power generation and in niche applications such as toy steam engines.
