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Noun: booster rocket  'boos-tu(r) 'ró-kit
  1. The first stage of a multistage rocket that provides initial thrust
    "The booster rocket separated from the spacecraft after reaching the upper atmosphere";
    - booster, booster unit, takeoff booster, takeoff rocket

Derived forms: booster rockets

Type of: rocket, rocket engine

Part of: multistage rocket, step rocket

Encyclopedia: Booster rocket