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retrotransposon
retroussé
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retropack
ret·ro·pack [ réttrō pàk ] (plural ret·ro·packs)


noun 
Definition:
 
rocket cluster: an array of retrorockets on a spacecraft, used for slowing down or for changing direction
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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