[{"Bold_text": "noun", "List Items": ["Classical Mythology.one of a race of creatures having the head, trunk, and arms of a man, and the body and legs of a horse.", "Cen·taur,Astronomy.the constellation Centaurus .", "a skillful horseman or horsewoman.", "Cen·taur,Rocketry.a U.S. upper stage upper stage,with a restartable liquid-propellant engine, used with an Atlas or Titan booster to launch satellites and probes."]}]