ionizer

UK: /ˈaɪəˌnaɪzə/

Collins Concise English Dictionary © HarperCollins Publishers::

ionizer, ioniser / ˈaɪəˌnaɪzə/ noun

1. a person or thing that ionizes, esp an electrical device used within a room to refresh its atmosphere by restoring negative ions

WordReference Random House Learner's Dictionary of American English © 2026

i•on•ize /ˈaɪəˌnaɪz/   v., -ized, -iz•ing. 

1. Chemistry, Physics [~ + object] to separate or change into ions.
2. Chemistry, Physics [no object] to become changed into ions.

i•on•i•za•tion /ˌaɪənɪˈzeɪʃən/  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

i•on•ize  (ī′ə nīz′), v., -ized, -iz•ing. 
v.t. 

1. Chemistry, Physics to separate or change into ions.
2. Chemistry, Physics to produce ions in.

v.i. 

3. Physics to become changed into the form of ions, as by dissolving.

Also,[esp. Brit.,] i′on•ise′. 

• ion + -ize 1895–1900

i′on•iz′a•ble, adj. 
i′on•i•za′tion, n. 
i′on•iz′er, n.