radium
Radium (noun) means a rare, highly radioactive metallic chemical element (symbol Ra). Example: “Marie Curie won a Nobel Prize for her discovery of radium.”
How to use radium
Learner’s notesIn plain EnglishA dangerously radioactive metal element, famous for its role in early radioactivity research.
Word forms
- Plural
- radiums
- Third person singular
- radiums
- Past tense
- radiumed
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Marie Curie won a Nobel Prize for her discovery of _____.
Etymology
Borrowed from French radium, built from "radio(actif)" ("radioactive") plus the element-naming suffix "-ium".
Synonyms
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Rhymes for radium
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