from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A rocket engine that develops thrust by expelling ions rather than gaseous combustion products. Also called ion rocket.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a type of spacecraft propulsion, whereby electric fields accelerate ions out the exhaust to provide motive force
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a type of reaction-propulsion engine to propel rockets in space; a stream of positive ions is accelerated to a high velocity by an electric field
Sorry, no etymologies found.