ion propulsion

Rocketry. a projected type of propulsion for vehicles in outer space, the exhaust consisting of positive ions and negative electrons repelled from the vehicle by electrostatic forces, resulting in a very high exhaust velocity.
Also, ionic propulsion. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Install an ion propulsion engine and send it slowly to its destination.
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