Meaning of the word radioactivity in English

What does radioactivity mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

radioactivity

US /ˌreɪ.di.oʊ.ækˈtɪv.ə.t̬i/
UK /ˌreɪ.di.əʊ.ækˈtɪv.ə.ti/
"radioactivity" picture

Noun

the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei

Example:
The scientists studied the effects of radioactivity on living organisms.
The nuclear power plant carefully monitors for any signs of increased radioactivity.