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external-combustion

American

[ik-stur-nl-kuhm-buhs-chuhn] / ɪkˈstɜr nl kəmˈbʌs tʃən /

adjective

noting or pertaining to an engine, as a steam engine, in which fuel ignition takes place outside the cylinder, turbine, or the like, in which heat energy is transformed into mechanical force.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023