- an engine that produces power as a reaction to the momentum given to gases ejected from it, as a rocket or jet engine.
Origin of reaction engine
First recorded in 1865–70
Also called reaction motor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for reaction engine
It revolved by the agency of steam, and was of the form that we should now call a reaction-engine.History of the Conflict Between Religion and Science
John William Draper
- an engine, such as a jet or rocket engine, that ejects gas at high velocity and develops its thrust from the ensuing reaction