radium
/ˈɹeɪ.dɪ.əm/
A radioactive element once used in glow-in-the-dark paint.
“Radium was used in clocks to make them glow.”
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inoh
inoh
/ˈɹeɪ.dɪ.əm/
A radioactive element once used in glow-in-the-dark paint.
“Radium was used in clocks to make them glow.”
My Deckに追加