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Definition of anion noun from the Oxford Advanced Learner's Dictionary

anion

noun

/ˈænaɪən/

/ˈænaɪən/

(chemistry, physics)

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an ion with a negative electrical charge compare cationTopics Physics and chemistryc2
Word Originmid 19th cent.: from anode or ana- + ion.

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See anion in the Oxford Advanced American DictionarySee anion in the Oxford Learner's Dictionary of Academic English

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