radon | ||
1. | [ noun ] (chemistry) 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 | |
Synonyms: | atomic_number_86 Rn | |
Related terms: | chemical_element noble_gas | |
Similar spelling: |
ration ratan Radin radome Radney rattan radian |