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Ion engine

a type of rocket engine in which thrust is obtained by the electrostatic acceleration of charged positive ions Compare plasma 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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  • Ionesco

    [yuh-nes-koh, ee-uh-] /yəˈnɛs koʊ, i ə-/ noun 1. Eugène [French œ-zhen;; English yoo-jeen,, yoo-jeen] /French œˈʒɛn;; English yuˈdʒin,, ˈyu dʒin/ (Show IPA), 1912–94, French playwright, born in Romania. /ˌiːəˈnɛskəʊ; French jɔnɛsko/ noun 1. Eugène (øʒɛn). 1912–94, French dramatist, born in Romania; a leading exponent of the theatre of the absurd. His plays include The Bald […]

  • Ion-exchange

    noun 1. the process of reciprocal transfer of ions between a solution and a resin or other suitable solid. noun 1. the process in which ions are exchanged between a solution and an insoluble solid, usually a resin. It is used to soften water, to separate radioactive isotopes, and to purify certain industrial chemicals ion […]

  • Ion exchanger

    ion exchanger n. A polymer containing charged groups to which other charged mobile ions become attached or replaced, used in chromatography.

  • Ion-exchange resin

    ion-exchange resin n. An insoluble polymer containing charged groups or ions that can be exchanged for charged groups or ions present in a surrounding solution.

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