retrorocket
/ˈrɛtroʊˌrɑkɪt/
noun
- A rocket engine that produces thrust in the opposite direction of motion, used to slow down a spacecraft or vehicle.
- The spacecraft fired its retrorocket to slow down before landing on the moon.
- Without a working retrorocket, the probe would have crashed into the planet's surface.
- Engineers tested the retrorocket to ensure it could safely reduce the capsule's speed.
Synonyms