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ENGLISH · A WORD WITH POSSIBILITIES

radiation.

The shooting forth of anything from a point or surface, like diverging rays of light.

9 characters3 syllables approx.English language

Meaning & usage

noun/ˌɹeɪ.diˈeɪ.ʃən/Canada, UK, US/ˌɹæɪ.diˈæɪ.ʃən/Australia/ɹæ.diˈeɪ.ʃən/
  1. The shooting forth of anything from a point or surface, like diverging rays of light.

    countable · uncountable
    The radiation of love from the crowd was addictive to the young singer-songwriters.
  2. The shooting forth of anything from a point or surface, like diverging rays of light. Ellipsis of electromagnetic radiation.

    abbreviation · alt-of · countable · ellipsis · often · uncountable
    heat radiation
  3. The process of radiating waves or particles.

    countable · uncountable
  4. The transfer of energy via radiation.

    countable · uncountable
  5. Radioactive energy.

    countable · uncountable
  6. A rapid diversification of an ancestral species into many new forms.

    countable
Where this word comes from

Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.