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
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radon::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Synonyms | atomic number 86, rn |
| Type of | argonon, chemical element, element, inert gas, noble gas |
