from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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
- n. 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.
- n. a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course
Sorry, no etymologies found.