retro-rocket

A spacecraft fires its retro-rocket as it approaches a planet.

Definition

Noun: A retro-rocket is a small rocket engine that is used to slow down a spacecraft, typically when it is returning to Earth's atmosphere or preparing to land. It fires in the opposite direction of the spacecraft's motion, creating thrust that reduces speed.

Usage Examples

• (The small rocket engine was used to reduce speed.)
• (The rocket helps the lunar module decelerate.)

Advanced Usage

• "retro-rocket braking": the process of using retro-rockets to decelerate a vehicle.
  • The lander used retro-rocket braking to touch down gently on the Martian surface. (The rockets slowed the descent.)

Variants and Related Words

• Retro-rocket (adj): relating to or involving a retro-rocket.

  • The retro-rocket system was tested successfully. (The system of small braking rockets.)

• Retrofire (n): the ignition of a retro-rocket.

  • The retrofire occurred exactly on schedule. (The firing of the retro-rocket.)

Synonyms

• Braking rocket: a rocket used to reduce speed.
• Deceleration rocket: a rocket that decreases velocity.

Related Idioms

• (This word is specialized and not used in idiomatic expressions.)