takeoff booster(n = noun.artifact) booster, booster rocket, booster unit, takeoff rocket - the first stage of a multistage rocket;
is a kind of rocket, rocket engine
is a part of multistage rocket, step rocket

booster, booster amplifier, booster cable, booster dose, booster rocket, booster shot, booster station, booster unit, morale booster, power takeoff, takeoff, takeoff rocket