ion

See also: Appendix:Variations of "ion"

English

Etymology 1

From the ending of anion and cation, which in turn is from Ancient Greek ἰόν (ión, “going”), neuter present participle of εἶμι (eîmi, “I go”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year.

Pronunciation

• (UK) enPR: ī'ən, IPA^(key): /ˈaɪən/; enPR: ī'ŏn, IPA^(key): /ˈaɪ.ɒn/
• (US) enPR: ī'ŏn, IPA^(key): /ˈaɪ.ɑn/

• Audio (US):

  (file)

• (Indic) IPA^(key): /ajˈɔn/, /ˈajən/
• Rhymes: -aɪən, -aɪɒn
• Homophone: iron (in some accents only)

Noun

ion (plural ions)

2. An atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.

   Hyponyms: (cardinal types) anion (−); cation (+); for many more, see Derived terms

Derived terms

• alkanium ion
• amidium ion
• aminium ion
• anion
• arenium ion
• arenonium ion
• arsanylium ion
• autoion
• benzenium ion
• benzenonium ion
• bromonium ion
• byion
• carbenium ion
• carbonium ion
• cation
• chloronium ion
• coion
• common-ion effect
• complex ion
• counterion
• diion
• dipolar ion
• electrion
• electron
• fluoronium ion
• gegenion
• halonium ion
• heavy ion
• hydrogen ion
• hydronium ion
• interion
• iodonium ion
• ion carrier
• ion channel
• ion channelopathy
• ion chromatography
• ion engine
• ion exchange
• ion exchange chromatography
• ion exchange resin
• ionic
• ionics
• ionise, ionize
• ionist
• ion milling
• ion mirror
• iono-
• ionogel
• ionogenic
• ionome
• ionophore
• ion selective electrode
• ion-selective electrode
• ion-selective membrane
• ion storm
• ion trap
• ion wind
• Li-ion
• lithium-ion battery
• lithium ion battery
• macroion
• microion
• monoion
• multiion
• nebenion
• oxoion
• oxonium ion
• oxylium ion
• photoion
• polyion
• radical ion
• secondary ion mass spectrometry
• sodion
• solion
• spectator ion
• sulphion
• superion
• t
• thermion
• un-ionized
• unionized

Translations

atom or group of atoms bearing an electrical charge

• Albanian: jon (sq) m
• Arabic: شَارِد m (šārid), أَيُون m (ʔayūn)
• Armenian: իոն (hy) (ion)
• Asturian: ion m
• Basque: ioi (eu)
• Bengali: আয়ন (bn) (aẏon)
• Bulgarian: йон m (jon)
• Burmese: အိုင်းယွန်း (uing:ywan:)
• Catalan: ió (ca) m
• Chinese:

  Mandarin: 離子 / 离子 (zh) (lízǐ)

• Czech: iont (cs) m
• Danish: ion (da) c
• Dutch: ion (nl)
• Esperanto: jono
• Estonian: ioon
• Finnish: ioni (fi)
• French: ion (fr) m
• Galician: ión (gl) m
• Georgian: იონი (ioni)
• German: Ion (de) n
• Greek: ιόν (el) n (ión)
• Hungarian: ion (hu)
• Icelandic: jón f, fareind f
• Ido: iono (io)
• Indonesian: ion (id)
• Italian: ione (it) m
• Japanese: イオン (ja) (ion)
• Khmer: យាត្រាណូ (yea tra no), ចរាណូ (jor ra no), អ៊ីយ៉ុង (ʼiiyong)
• Korean: 이온 (ion)
• Latvian: jons (lv) m
• Lombard: jun
• Norwegian:

  Bokmål: ion (no) n

  Nynorsk: ion n

• Persian: یون (fa) (yon)
• Polish: jon (pl) m
• Portuguese:

  Brazilian Portuguese: íon (pt) m

  European Portuguese: ião (pt) m

• Quechua: iyun
• Russian: ио́н (ru) m (ión)
• Serbo-Croatian: јон m (jon), ion (sh) m
• Sicilian: ioni (scn) m
• Slovene: ion (sl) m
• Spanish: ion (es) m, ión (es) m
• Swahili: ioni
• Swedish: jon (sv) c
• Tagalog: dagipik
• Thai: ไอออน (th) (ai-ɔ̂n)
• Turkish: iyon (tr)
• Ukrainian: йон m (jon)
• Vietnamese: ion (vi), ly tử
• Volapük: yion (vo)
• Welsh: ïon m

Etymology 2

From a reduction of I don't.

Pronunciation

• IPA^(key): /ˈaɪˌoʊn/

Phrase

ion

1. (African-American Vernacular, slang) I don't.

   ion know what 2 do

   I don't know what to do

   ion want 2

   I don't want to

Anagrams

• oni, NOI, Ino, ONI, NIO, -ino

Czech

Alternative forms

• iont

Pronunciation

• IPA^(key): [ˈjon]
• IPA^(key): [ˈɪjon]
• IPA^(key): [ˈjoːn]
• IPA^(key): [ˈɪjoːn]

Noun

ion m inan

1. ion

Declension

Declension of ion (hard masculine inanimate irreg-stem)

	singular	plural
nominative	ion	ionty
genitive	iontu	iontů
dative	iontu	iontům
accusative	ion	ionty
vocative	ionte	ionty
locative	iontu	iontech
instrumental	iontem	ionty

Further reading

• “ion”, in Příruční slovník jazyka českého (in Czech), 1935–1957
• “ion”, in Slovník spisovného jazyka českého (in Czech), 1960–1971, 1989
• “ion”, in Akademický slovník cizích slov at prirucka.ujc.cas.cz [Academic dictionary of foreign words] (in Czech), 1995

Danish

Alternative forms

• jon

Etymology

From Ancient Greek ἰόν (ión, “going”).

Noun

ion (singular definite ionen, plural indefinite ioner)

1. (chemistry, physics) an ion

Declension

Declension of ion

gender	singular		plural
	indefinite	definite	indefinite	definite
nominative	ion	ionen	ioner	ionerne
genitive	ions	ionens	ioners	ionernes

See also

• ionisere

References

• “ion” in Den Danske Ordbog

Dutch

Etymology

Borrowed from English ion.

Pronunciation

• IPA^(key): /iˈɔn/, /jɔn/

• Audio:

  (file)

• Hyphenation: ion
• Rhymes: -ɔn

Noun

ion n (plural ionen, no diminutive)

1. ion (charged atom or compound)

Derived terms

• ioniseren

Esperanto

Pronunciation

• IPA^(key): /ˈion/

• Audio 1:

  (file)

• Audio 2:

  (file)

• Audio 3:

  (file)

• Rhymes: -ion
• Syllabification: i‧on

Pronoun

ion

1. accusative of io

French

Etymology

English ion.

Pronunciation

• IPA^(key): /jɔ̃/, /i.ɔ̃/

• Audio (France (Brétigny-sur-Orge)):

  (file)

Noun

ion m (plural ions)

1. (physical chemistry) ion

Descendants

• → Persian: یون (yon)

Further reading

• “ion”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012

Indonesian

Etymology

Borrowed from English ion, from Ancient Greek ἰόν (ión, “going”), neuter present participle of εἶμι (eîmi, “I go”).

Pronunciation

• (Standard Indonesian) IPA^(key): /ˈion/ [ˈi.ɔn]
• Rhymes: -on
• Syllabification: i‧on

Noun

ion (plural ion-ion)

1. (chemistry) ion (atom or group of atoms bearing an electrical charge)

Hyponyms

• ion anorganik
• ion hidrogen
• ion hidroksida
• ion hidronium
• ion jemputan
• ion kalium
• ion kalsium
• ion karbonat
• ion klorida
• ion kompleks
• ion konservatif
• ion lawan
• ion logam
• ion magnesium
• ion negatif
• ion nitrat
• ion nonkonservatif
• ion pelepas struktur
• ion penonton
• ion positif
• ion sianida
• ion tembaga

Derived terms

• berion
• mengion
• mengionkan
• pengion
• pengionan
• terion
• terionkan

Further reading

• “ion”, in Kamus Besar Bahasa Indonesia [Great Dictionary of the Indonesian Language] (in Indonesian), Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016

Japanese

Romanization

ion

1. Rōmaji transcription of いおん
2. Rōmaji transcription of イオン

Norwegian Bokmål

Etymology

From Ancient Greek ἰόν (ión, “going”).

Noun

ion n (definite singular ionet, indefinite plural ioner, definite plural iona or ionene)

1. (chemistry, physics) an ion

Derived terms

• ionisk
• ionosfære

References

• “ion” in The Bokmål Dictionary.

Norwegian Nynorsk

Etymology

From Ancient Greek ἰόν (ión, “going”).

Noun

ion n (definite singular ionet, indefinite plural ion, definite plural iona)

1. (chemistry, physics) an ion

Derived terms

• ionisk
• ionosfære

References

• “ion” in The Nynorsk Dictionary.

Romanian

Etymology

Borrowed from French ion.

Noun

ion m (plural ioni)

1. ion

Declension

	singular			plural
	indefinite	definite		indefinite	definite
nominative-accusative	ion	ionul		ioni	ionii
genitive-dative	ion	ionului		ioni	ionilor
vocative	ionule			ionilor

Spanish

Alternative forms

• ión (pre-2010)

Pronunciation

 

• IPA^(key): /ˈʝon/ [ˈɟ͡ʝõn]

• IPA^(key): /ˈʝon/ [ˈɟ͡ʝõn] (everywhere but Argentina and Uruguay)
• IPA^(key): /ˈjon/ [ˈjõn] (Argentina and Uruguay)

• • Rhymes: -on
• IPA^(key): /iˈon/ [iˈõn]
  • Rhymes: -on
• Syllabification: ion

Noun

ion m (plural iones)

1. ion (atom or group of atoms bearing an electrical charge)

Further reading

• “ion”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025

Vietnamese

Etymology

From French ion, from English ion.

Pronunciation

• (Hà Nội) IPA^(key): [ʔi˧˧ ʔɔn˧˧], [ʔi˧˧ ʔəwŋ͡m˧˧]
• (Huế) IPA^(key): [ʔɪj˧˧ ʔɔŋ˧˧], [ʔɪj˧˧ ʔəwŋ͡m˧˧]
• (Saigon) IPA^(key): [ʔɪj˧˧ ʔɔŋ˧˧], [ʔɪj˧˧ ʔəwŋ͡m˧˧]
• Phonetic spelling: i on, i ông

Noun

ion

1. an ion

See also

• ion hoá