Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A rocket engine used to retard, arrest, or reverse the motion of a vehicle, such as an aircraft, missile, or spacecraft.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A small rocket engine on a larger rocket or spacecraft designed to slow or reverse its motion.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course

Etymologies

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Examples

  • There is no atmosphere where parachutes can be used, so it has to retrorocket all the way down.

    Europa Capable of Supporting Life, Scientist Says | Universe Today 2009

  • "We could very well be seeing rock, or we could be seeing exposed ice in the retrorocket blast zone," said Ray Arvidson of Washington University, St. Louis, Mo., co-investigator for the robotic arm.

    NASA Watch: Keith Cowing: May 2008 Archives 2008

  • "We could very well be seeing rock, or we could be seeing exposed ice in the retrorocket blast zone," said Ray Arvidson of Washington University, St. Louis, Mo., co-investigator for the robotic arm.

    NASA Watch: Space Science News: May 2008 Archives 2008

  • Aug. 20, 1960:After a day in orbit Sputnik 5fires its retrorocket, and when it lands safely, two dogs inside, Strelka and Belka, become the first living creatures to return to Earth from space.

    Briefly, They Were the Equal of Monkeys 2007

  • Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.

    Riding Rockets Astronaut Mike Mullane 2006

  • Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.

    Riding Rockets Astronaut Mike Mullane 2006

  • Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.

    Riding Rockets Astronaut Mike Mullane 2006

  • Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.

    Riding Rockets Astronaut Mike Mullane 2006

  • Thus . . . the transporter, which eliminated any need for the goofy retrorocket landings, was born.

    I’m Working on That William Shatner 2002

  • Thus . . . the transporter, which eliminated any need for the goofy retrorocket landings, was born.

    I’m Working on That William Shatner 2002

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