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Entry

イオン

ion

A charged atom or molecule.

Science & MedicinePure GairaigoSource: German

Meaning

A particle with an electric charge, formed when an atom or molecule gains or loses electrons.

  • Basic chemistry and physics term for a charged particle.

Examples

Example Sentences

水(みず)に塩(しお)を溶か(とか)すと、ナトリウムイオンなどのイオンが発生(はっせい)します。

When salt is dissolved in water, ions such as sodium ions are generated.

Source: Internal

リチウムイオン電池(でんち)は、現代(げんだい)の電子機器(でんしきき)に欠か(かか)せない技術(ぎじゅつ)です。

Lithium-ion batteries are an essential technology for modern electronic devices.

Source: Internal

空気清浄機(くうきせいじょうき)から放出(ほうしゅつ)されるマイナスイオンが、部屋(へや)の空気(くうき)をリフレッシュします。

Negative ions released from an air purifier refresh the air in the room.

Source: Internal
Tatoebasmall_snowCC BY 2.0 FR

ライオンです。

It's a lion.

Source: Sentence 11052363

TatoebamarcelostockleCC BY 2.0 FR

これはライオンです。

This is a lion.

Source: Sentence 1388924

TatoebabunbukuCC BY 2.0 FR

ライオンとトラはどこ？

Where are the lions and tigers?

Source: Sentence 1156853

Tatoebasmall_snowCC BY 2.0 FR

ライオンが人（ひと）を襲（おそ）った。

The lion attacked the person.

Source: Sentence 12975728

Tatoebasmall_snowCC BY 2.0 FR

ライオンは檻（おり）の中（なか）です。

The lions are in the cage.

Source: Sentence 11570973

TatoebaCC BY 2.0 FRFurigana needs review

ライオンは肉（にく）食（しょく）動（どう）物（ぶつ）です。

Lions are carnivores.

Source: Sentence 13337131

TatoebaCC BY 2.0 FRFurigana needs review

ライオンは動（どう）物（ぶつ）の王（おう）者（じゃ）だ。

The lion is the king of beasts.

Source: Sentence 192677

View Sentence Bank

Related

ゲル

geru

A gel, especially in chemistry or materials.

ｐＨ

pee haa

Numeric scale used to specify the acidity or basicity of an aqueous solution.

モル

moru

SI unit for amount of substance.

See Also

花椒塩

howajaoien

Food & Drink

Seasoning made of roasted Sichuan pepper and salt.

ライオン

raion

Places & Environment

A large well-known wild cat that lives in prides.

バイオリン

baiorin

Arts & Entertainment

A wooden string instrument.

インディオ

indio

People & Social Life

Indigenous people of Central and South America.

Entry Questions

What does イオン mean in Japanese?

イオン means A charged atom or molecule.

How do you read イオン?

イオン is read as いおん and romanized as ion.

What language does イオン come from?

The source language for イオン is German.

What type of gairaigo is イオン?

イオン is listed as Pure Gairaigo.

Source Details

Entry ID
1021120
Source
JMdict_english
Revision
JMdict.2026-04-17
Review notes
No special notes
Active language
English
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