external-combustion engine

English Thesaurus

1. a heat engine in which ignition occurs outside the chamber (cylinder or turbine) in which heat is converted to mechanical energy (noun.artifact)

hypernym	:	heat engine,
definition	:	any engine that makes use of heat to do work (noun.artifact)

hyponym	:	steam engine,
definition	:	external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder (noun.artifact)