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English definition of “retrorocket”

retrorocket

noun [C]     /ˌret.rəʊˈrɒk.ɪt/ US  /-rəˈrɑː.kɪt/
a rocket on a spacecraft or an aircraft that fires in the opposite direction to the direction in which the vehicle is travelling , in order to slow it downSpace travelParts of aeroplanes
(Definition of retrorocket noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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