often attributive
: an intensely radioactive metallic chemical element that occurs in combination in minute quantities in minerals (such as pitchblende or carnotite), emits alpha particles and gamma rays to form radon, and is used chiefly in the treatment of cancer and in radiographic devices see Chemical Elements Table
Examples of radium in a Sentence
Recent Examples on the Web
Their diet includes muskrats, a primary predator of freshwater mussels, which are now confirmed to carry radium.
—
Kevin Lynn, Newsweek, 7 Jan. 2025
Christopher Scott Murillo’s multi-platform scenic design, complemented by Curtis Mueller’s radium green-hued lighting and Harper Justus’ sound design, bring a magical quality to the production.
—Pam Kragen, San Diego Union-Tribune, 2 Feb. 2025
Exposure to high levels of radium can result in adverse health conditions like anemia, cataracts, fractured teeth, cancer (especially bone cancer) and death, the U.S. Centers for Disease Control and Prevention says.
—Kevin Lynn, Newsweek, 7 Jan. 2025
The stress of being a loyal husband and father while toiling tirelessly at Spacely Space Sprockets – headed by a domineering man with a Napoleon complex – seems to float away as the zooming saucer-like aero cars with large bubble roofs leave behind popcorn-like residue from fuel pellets and radium.
—Natasha Gural, Forbes, 6 Jan. 2025
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Kevin Lynn, Newsweek, 7 Jan. 2025
Christopher Scott Murillo’s multi-platform scenic design, complemented by Curtis Mueller’s radium green-hued lighting and Harper Justus’ sound design, bring a magical quality to the production.
—Pam Kragen, San Diego Union-Tribune, 2 Feb. 2025
Exposure to high levels of radium can result in adverse health conditions like anemia, cataracts, fractured teeth, cancer (especially bone cancer) and death, the U.S. Centers for Disease Control and Prevention says.
—Kevin Lynn, Newsweek, 7 Jan. 2025
The stress of being a loyal husband and father while toiling tirelessly at Spacely Space Sprockets – headed by a domineering man with a Napoleon complex – seems to float away as the zooming saucer-like aero cars with large bubble roofs leave behind popcorn-like residue from fuel pellets and radium.
—Natasha Gural, Forbes, 6 Jan. 2025
See All Example Sentences for radium
Cite this Entry
“Radium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radium. Accessed 3 Mar. 2025.
Copy CitationKids Definition
Medical Definition
radium
noun
ra·di·um
ˈrād-ē-əm 
often attributive
: an intensely radioactive shining white metallic element that resembles barium chemically, that occurs in combination in minute quantities in minerals (as pitchblende or carnotite) principally as the isotope of mass number 226 formed from uranium 238, having a half-life of 1620 years, and emitting alpha particles and gamma rays to form radon, and that is used chiefly in luminous materials and in the treatment of cancer
—symbol Ra
see Chemical Elements Table
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