re-action engine

reaction engine

noun Aeronautics, Rocketry.
an engine that produces power as a reaction to the momentum given to gases ejected from it, as a rocket or jet engine.
Also called reaction motor.


Origin:
1865–70

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
reaction engine or reaction motor
 
n
an engine, such as a jet or rocket engine, that ejects gas at high velocity and develops its thrust from the ensuing reaction
 
reaction motor or reaction motor
 
n

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