# irradiation

/ˌɪˌɹeɪdiˈeɪʃən/ (US) · CEFR C2 · Noun

Source: https://englishreference.com/word/irradiation
Updated: 2026-05-08

## Definition

the process of exposing something to radiation, such as X-rays or light. It is often used to kill bacteria in food or to treat medical conditions.

For teachers: exposure to radiation, such as ultraviolet light, X-rays, or alpha particles. Often refers to the deliberate application of ionizing radiation for sterilization or medical therapy.

## Examples

- Irradiation helps keep food fresh for a longer time.
- The hospital uses gamma irradiation to sterilize surgical equipment that cannot withstand the high heat of a traditional oven.
- Food safety experts argue that low-dose irradiation effectively eliminates pathogens without significantly altering the nutritional profile or flavor of the produce.

## Usage notes

- Uncountable when referring to the general process; can be countable when referring to specific instances or treatments.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.