takeoff booster

Noun
  1. The first stage of a multistage rocket (synset 102875694)
    is a type of: rocket, rocket engine - a jet engine containing its own propellant and driven by reaction propulsion
    is a part of: multistage rocket, step rocket - a rocket having two or more rocket engines (each with its own fuel) that are fired in succession and jettisoned when the fuel is exhausted
    same as: booster, booster rocket, booster unit, takeoff rocket

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