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Definition of radium

radium

/ˈreɪ.di.əm/
ra · di · um
Adjective:radic
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radium Lexical Profile

radium Game Scores & Validity

• noun

1

A rare, brilliantly white, luminescence-producing, and highly radioactive metallic chemical element of the alkaline earth group, with the symbol Ra and atomic number 88, found in minute quantities in uranium ores.

Example

"Marie and Pierre Curie discovered radium while investigating the intense radioactivity of pitchblende."

• Rhymes for radium

• Nearby Words

radiotherapy
radiothon
radish
radium
radius
radon
raffish

Word Origin & Etymology

Coined in 1898 by French physicists Marie and Pierre Curie, from Latin 'radius' meaning 'ray', in reference to the element's intense emission of energy in the form of rays.

Cite this Entry

Wordmom. (2026). Definition of Radium. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/radium
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