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English definition of “retrorocket”

retrorocket

noun [C] uk   /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 down
(Definition of retrorocket from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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