Radium
Pronunciation: /ˈreɪdiːəm/
Radium (noun)
- A rare, radioactive metal that glows in the dark and is used in some medical treatments.
- A chemical element with the symbol Ra and atomic number 88, known for its radioactivity.
Examples
- Radium emits a faint glow in the dark.
- The glowing metal was once used in watch dials.
Common collocations: emit light, faint glow, highly radioactive, periodic table