radioactivity
/ˌreɪdioʊækˈtɪvəti/
noun
- The process by which unstable atoms release energy in the form of particles or waves, or the property of being radioactive.
- Marie Curie is famous for her research on radioactivity.
- The Geiger counter measures the level of radioactivity in the area.
- Natural radioactivity is found in soil, rocks, and even the human body.
Synonyms