ion

The Simple English Wikipedia has an article on:

Ion

Pronunciation

• (UK) IPA ^(key): /ˈaɪən/

• Audio (US)

  (file)

• Homophone: iron (in some accents only)

Noun

Singular ion

Plural ions

1. (countable) An ion is a charged atom.

   Ions are of two types – cations and anions.