- 1. n. a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health Source: wordnet
- 2. n:100 n. a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health Source: ecdict
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radiumareasconsidereddisintegrationelementformedgaseousgassesgranitehazardhealthheaviestinertnaturallyoccursradioactive