ion
noun/ˈaɪən/, /ˈaɪɒn/
/ˈaɪən/, /ˈaɪɑːn/
(physics or chemistry)- an atom or a molecule with a positive or negative electric charge caused by its losing or gaining one or more electronsTopics Physics and chemistryc2Word Originmid 19th cent.: from Greek, neuter present participle of ienai ‘go’.
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ion