英英字典： Rn
Overview of noun rn
The noun rn has 2 senses
- radon, Rn, atomic number 86 -- (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)
- registered nurse, RN -- (a graduate nurse who has passed examinations for registration)
(TTS Sound)
