Definition of Rn

Noun: Rn

1. 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
   - radon, atomic number 86

1. A graduate nurse who has passed examinations for registration
   - registered nurse

See also:
rms
RNA

Anagrams containing the word rn

rn nr