radioactivity

noun
UK: /ˌreɪ.di.oʊ.ækˈtɪv.ə.ti/
US: /ˌreɪ.di.oʊ.ækˈtɪv.ə.ti/

  1. The release of energy or particles from an unstable atom.

    1. The radioactivity levels are very low after the event.
    2. Exposure to high levels of radioactivity can be dangerous to human health and the environment.

  2. The phenomenon of emitting radiation or particles caused by the spontaneous disintegration of atomic nuclei.

    1. The scientist studied radioactivity to understand nuclear decay.
    2. Understanding natural radioactivity is crucial for the safe disposal of nuclear waste materials.

Synonyms

radiation

Frequently Asked Questions

The word "radioactivity" in English means: The release of energy or particles from an unstable atom., The phenomenon of emitting radiation or particles caused by the spontaneous disintegration of atomic nuclei..

The phonetic transcription of "radioactivity" is /ˌreɪ.di.oʊ.ækˈtɪv.ə.ti/ in British English and /ˌreɪ.di.oʊ.ækˈtɪv.ə.ti/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "radioactivity": radiation.

Example usage of "radioactivity": "The radioactivity levels are very low after the event.". More examples on the page.