Meaning of the word radium in English

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

radium

US /ˈreɪ.di.əm/
UK /ˈreɪ.di.əm/

Noun

a radioactive metallic chemical element of the alkaline earth series, occurring in uranium ores. Symbol: Ra

Example:
Marie Curie discovered radium.
Radium was once used in luminous paints.