jet propulsion

the propulsion of a body by its reaction to a force ejecting a gas or a liquid from it. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
jet propulsion
1.  propulsion by means of a jet of fluid
2.  propulsion by means of a gas turbine, esp when the exhaust gases provide the propulsive thrust

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
jet propulsion  
  1. The driving of an aircraft by the powerful thrust developed when a jet of gas is forced out of a jet engine.

  2. Propulsion by means of any fluid that is forced out in a stream in the opposite direction. Squids, octopuses, and cuttlefish, for example, jet their way through the ocean by taking in and then quickly expelling water.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
His novel jet propulsion merely meant that he broke his neck, rather than his
Jet propulsion is a popular but problematic way to get around, for humans and
  animals both.
Typical jet propulsion pushes water in a straight stream.
For all these flying squid species, jet propulsion is the key for getting out
  of the water in the first place.
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