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| rock·et en·gine (plural rock·et en·gines) |
noun |
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| Definition: |
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device producing thrust by expelling gases: a device that carries both fuel and oxidizer, which it burns in a combustion chamber, producing thrust by expelling the expanding hot gases through a nozzle. The fuel and oxidizer may be liquefied gases such as oxygen and hydrogen, or solids such as powdered aluminum and ammonium perchloride.
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