ion

noun

🔊/ˈaɪən/, 🔊/ˈaɪɒn/

🔊/ˈaɪən/, 🔊/ˈaɪɑːn/

(physics物理 or chemistry化学)

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an atom or a molecule with a positive or negative electric charge caused by its losing or gaining one or more electrons离子
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Topics Physics and chemistryc2
Word Originmid 19th cent.: from Greek, neuter present participle of ienai ‘go’.