irradiated

IPA/ɪɹˈeɪdɪˌeɪtɪd/
KK[ˌɪrˈediˌetɪd]IPA/ˌɪrˈeɪdiːˌeɪtɪd/

irradiated — adjective

1. describes food, medical supplies, or other materials that have been deliberately

1.adjectiveB1
Definition

describes food, medical supplies, or other materials that have been deliberately exposed to controlled radiation, usually to kill germs, preserve freshness, or sterilize equipment

Example

Some supermarkets in Japan sell irradiated potatoes to keep them from sprouting during storage.

collocation: irradiated + food type (potatoes)

The hospital orders irradiated blood for patients whose immune systems are very weak.

domain: medical use of irradiated blood products

Common collocations
  • irradiated food
  • irradiated blood
  • irradiated materials
  • irradiated equipment
  • irradiated produce
Synonyms
  • radiated

    less common as an adjective; can mean shaped like spokes rather than treated

  • sterilized

    narrower — focuses on germ-killing, not preservation or other effects

Antonyms
  • untreated

    not having undergone any processing

  • raw

    unprocessed in its natural state, especially for food

Grammar Patterns

irradiated + noun

Usage Note

The noun being described must be something deliberately treated with radiation in a controlled process — not naturally exposed (use 'exposed to radiation' for accidental or natural exposure).

Common Mistakes

I ate irradiated food at a picnic that had been left in the sun.
I ate irradiated food from a laboratory shelf.
'irradiated' means deliberately treated with controlled radiation, not heated by sunlight.

irradiated — verb

Word family

  • irradiate
    verbB2
  • irradiation
    nounB2
  • irradiant
    adjectiveC1
  • irradiative
    adjectiveC2

Synonym discussion

Sense: verb/1

All four words can relate to applying something to an object, but they differ in precision and scope. 'Irradiate' means applying controlled radiation for a specific purpose, most commonly in cancer therapy or food safety. 'Expose (to radiation)' is broader — it can describe accidental or uncontrolled contact (e.g., 'exposed to sunlight' or 'exposed to a radiation leak'), whereas 'irradiate' implies deliberate, measured application. 'Sterilize' overlaps when the goal is killing microorganisms, but it can be achieved by heat, chemicals, or filtration — not only radiation. 'Treat' is the most general: you can treat a patient with drugs, a surface with paint, or food with preservatives; 'irradiate' names the specific method. For example: a hospital irradiates blood before transfusing it to an immunocompromised patient, but it sterilizes surgical tools in an autoclave. Researchers irradiate a metal sample to test its durability, but they treat it with heat to study thermal expansion.

irradiateexpose ↗sterilize ↗treat ↗

Common collocations

Nouns

Adverbs

Phrases

  • with gamma rays
  • by electron beam
  • under controlled conditions

Prepositions

Etymology

LatinFrenchEnglish

Comes from Latin 'irradiare', meaning 'to shine upon'. The Latin word was formed from 'in-' (upon, into) and 'radiare' (to send out beams, to shine), which comes from 'radius' (a ray, a spoke of a wheel). In the 1600s, English borrowed it first for the literal 'shine upon' meaning. The modern scientific sense of treating with radiation appeared in the late 1800s after the discovery of X-rays and radioactivity.