retrorocket Definition in the Cambridge English Dictionary
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Definition of “retrorocket” - English Dictionary

Definition of "retrorocket" - British English Dictionary

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retrorocketnoun [C]

uk   /ˌret.rəʊˈrɒk.ɪt/  us   /-rəˈrɑː.kɪt/
a rocket on a ​spacecraft or an ​aircraft that ​fires in the ​oppositedirection to the ​direction in which the ​vehicle is ​travelling, in ​order to ​slow it down
(Definition of retrorocket from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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