reaction engine

noun

, Aeronautics, Rocketry.

1. an engine that produces power as a reaction to the momentum given to gases ejected from it, as a rocket or jet engine.

reaction engine

noun

1. an engine, such as a jet or rocket engine, that ejects gas at high velocity and develops its thrust from the ensuing reaction

Word History and Origins

Origin of reaction engine¹

First recorded in 1865–70

Example Sentences

His system is, as the firm’s name implies, a reaction engine.

From Economist

Out of the port they could see the red flare of a reaction engine; the next ship in their sector, speeding forward.

From Project Gutenberg

This also was the invention of Hero, and was a reaction engine, on the principle of the eolipile.

From Project Gutenberg

Broadly, reaction engines come in two varieties—rockets and jets—in which hot gases created by burning fuel are ejected out of the back, providing the action part of the law.

From Economist