Definition of radon
: a heavy radioactive gaseous element formed by the decay of radium — see element table
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Recent Examples of radon from the Web
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High levels of radon were found in some Centennial School District buildings, the district said this week.
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Custom kitchen cabinetry with crown molding is also included along with a USB charging outlet in the kitchen, soft-close drawers and a passive radon ventilation system in every home.
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This is a complication because the polonium and lead isotopes are part of the radon decay chain.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radon'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of radon
International Scientific Vocabulary, from radium
First Known Use: 1918
RADON Defined for English Language Learners
radon
playDefinition of radon for English Language Learners
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: a radioactive element which is a gas that is used medically in cancer treatments
Medical Dictionary
radon
playMedical Definition of radon
: 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; see element table
Learn More about radon
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See words that rhyme with radon Spanish Central: Translation of radon Nglish: Translation of radon for Spanish speakers Britannica English: Translation of radon for Arabic speakers Britannica.com: Encyclopedia article about radon
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