The process of exposing something to radiation, often for sterilization, preservation, or medical treatment.
From Latin irradiatus, past participle of irradiare 'to shine upon,' from in- 'upon' + radiare 'to emit rays,' from radius 'ray.' The word originally meant simply 'shining light upon' before acquiring nuclear-age meanings.
Food irradiation can extend shelf life and kill harmful bacteria without making food radioactive, yet many consumers fear it due to association with nuclear weapons. The same process that can destroy cancer cells can also preserve food safely.
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