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re-tread
re-up
reach
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reactance
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reaction engine
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reaction engine
re·ac·tion en·gine (plural re·ac·tion en·gines)


noun 
Definition:
 
engine producing thrust by ejecting gas: an engine such as a jet or rocket engine that produces thrust by ejecting a stream of gas at high velocity
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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