anion

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anion

/ˈænˌaɪ.ən/ US
/ˈænˌaɪ.ɑn/ US
/ˈænˌaɪ.ɒn/ UK

Where it comes from

Learned borrowing from Ancient Greek ἀνιόν (anión, “(thing) going up”), neuter present participle of ἄνειμι (áneimi, “go up”), from ἀνά (aná, “up”) + εἶμι (eîmi, “go”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year. By surface analysis, an- (“up, away, forward”) + ion.

noun anions

A negatively charged ion.
Opposite: cation

Translations

Every language

noun negatively charged ion

Español	anión
한국어	음이온 eumion
日本語	陰イオン in-ion, アニオン anion
中文	陰離子 /阴离子 yīnlízǐ
Português	ânion, anião, aníon, anionte
Français	anion
Deutsch	Anion
Italiano	anione
Ελληνικά	ανιόν anión
Русский	анио́н anión
Tiếng Việt	ly tử âm

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Cite this

MLA

"anion." Wiktionary, via Micwyn, micwyn.com/word/anion. Accessed 6 Nov. 2026.

APA

anion. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/anion

Chicago

"anion." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/anion.

BibTeX

@misc{anion_2026,
  title = {anion},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/anion},
  urldate = {2026-11-06}
}