Definition of “ion” - English Dictionary

“ion” in British English

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ionnoun [ C ]

/ˈaɪ.ɒn/ us /ˈaɪ.ɑːn/ specialized

an atom or small group of atoms that has an electrical charge because it has added or lost one or more electrons

ionic
adjective uk /aɪˈɒn.ɪk/ us /aɪˈɑː.nɪk/

ionic bonding

-ionsuffix

uk / -ən/ us / -ən/ also -ation, also -ition

(Definition of “ion” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“ion” in American English

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ionnoun [ C ]

us /ˈɑɪˌɑn, -ən/

physics, chemistry an atom that has a positive or negative electrical charge as the result of adding or taking away an electron

(Definition of “ion” from the Cambridge Academic Content Dictionary © Cambridge University Press)