ion engine


a type of rocket engine in which thrust is obtained by the electrostatic acceleration of charged positive ionsCompare plasma engine

Nearby words

  1. ioduria,
  2. iolanthe,
  3. iolite,
  4. iom,
  5. ion,
  6. ion exchange,
  7. ion exchanger,
  8. ion generator,
  9. ion implantation,
  10. ion propulsion

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for ion engine

ion engine

A rocket engine that develops thrust by expelling ions fired by an electron gun, used in some spacecraft. Though ion engines create less thrust than chemical combustion engines, they are considerably more efficient and require very little propellant, resulting in much lighter weight and less need for high thrust. See also solar-electric propulsion.
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