: a heavy radioactive gaseous element formed by the decay of radium see Chemical Elements Table
Examples of radon in a Sentence
Recent Examples on the Web
Besides an examination of the house, there may be other inspections required — perhaps for radon or termites.
—
Lew Sichelman, Miami Herald, 6 Mar. 2025
The process includes testing properties for substances like lead, mold, radon and asbestos.
—Celia Fernandez,tasia Jensen, CNBC, 4 Mar. 2025
Other risks are a family history of lung cancer or radon exposure.
—Cindy Krischer Goodman, Sun Sentinel, 25 Nov. 2024
Another important pre-move-in step is to make sure all of the detectors — smoke, carbon monoxide and radon — are operational.
—Lew Sichelman, Miami Herald, 23 July 2024
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Lew Sichelman, Miami Herald, 6 Mar. 2025
The process includes testing properties for substances like lead, mold, radon and asbestos.
—Celia Fernandez,tasia Jensen, CNBC, 4 Mar. 2025
Other risks are a family history of lung cancer or radon exposure.
—Cindy Krischer Goodman, Sun Sentinel, 25 Nov. 2024
Another important pre-move-in step is to make sure all of the detectors — smoke, carbon monoxide and radon — are operational.
—Lew Sichelman, Miami Herald, 23 July 2024
See All Example Sentences for radon
Cite this Entry
“Radon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radon. Accessed 12 Mar. 2025.
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Medical Definition
radon
noun
ra·don
ˈrā-dän 
: a heavy radioactive gaseous element of the group of inert gases formed by disintegration of radium and used similarly to radium in medicine
—symbol Rn
called also radium emanation
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