radioelement
/ˌreɪdioʊˈɛləmənt/
noun
- A chemical element that is radioactive, meaning its atoms break apart and release energy.
- Scientists can identify a radioelement by the type of radiation it gives off.
- Uranium is a well-known radioelement used in nuclear power plants.
- Some radioelements, like radium, were once used in glow-in-the-dark paint.