Definition of ion engine
English to English noun - 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
source: WordNet 3.0
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ion engine, insinew, inosine, imagine, incontinent, incontinence, incontinently, imaginable, imaginative, immunogen, imaginary, inogen, ingena, insane, imagination, ingeny, inknee, income, inguen, insume
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