Usage Note
Ionizado is the past participle of ionizar used as an adjective, describing a substance from which electrons have been removed or added to produce ions. Gas ionizado is the defining feature of plasma, sometimes called the fourth state of matter. The related noun is ionización and the agent noun ionizador (ionizer).
Examples
"El gas ionizado forma un plasma luminoso."
Natural Translation
The ionized gas forms a luminous plasma.

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