irradiated

From the verb irradiate: (⇒ conjugate)

irradiated is: ⓘ

v past

v past p

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

ir•ra•di•ate /v. ɪˈreɪdiˌeɪt; adj. -ɪt, -ˌeɪt/   v. [~ + object] , -at•ed, -at•ing, adj. 

1. to shed rays of light on;
   illuminate.
2. Physics to heat with radiant energy.
3. Physics to expose to radiation, as for medical treatment.

ir•ra•di•a•tion /ɪˌreɪdiˈeɪʃən/  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

ir•ra•di•ate  (v. i rā′dē āt′;adj. i rā′dē it, -āt′), v., -at•ed, -at•ing, adj. 
v.t. 

1. to shed rays of light upon;
   illuminate.
2. to illumine intellectually or spiritually.
3. to brighten as if with light.
4. Physics to radiate (light, illumination, etc.).
5. Physics to heat with radiant energy.
6. Physics to treat by exposure to radiation, as of ultraviolet light.
7. Physics to expose to radiation.

v.i. 

8. [Archaic.]
   • to emit rays;
     shine.
   • to become radiant.

adj. 

9. irradiated;
   bright.

• Latin irradiātus, past participle of irradiāre to shine upon. See ir-¹, radiate
• 1595–1605

ir•ra′di•at′ing•ly, adv. 
ir•ra′di•a′tive, adj. 
ir•ra′di•a′tor, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

irradiate / ɪˈreɪdɪˌeɪt/ verb

1. (transitive) to subject to or treat with light or other electromagnetic radiation or with beams of particles
2. (transitive) to expose (food) to electromagnetic radiation to kill bacteria and retard deterioration
3. (transitive) to make clear or bright intellectually or spiritually; illumine
4. a less common word for radiate1
5. (intransitive) to become radiant

irˈradiative adjective

irˈradiˌator noun