Meaning of ION in English

ION

/ ˈaɪən; NAmE ; BrE also ˈaɪɒn; NAmE also ˈaɪɑːn/ noun

( physics or chemistry ) an atom or a molecule with a positive or negative electric charge caused by its losing or gaining one or more electrons

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WORD ORIGIN

mid 19th cent.: from Greek , neuter present participle of ienai go.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.