Found 2 items, similar to RN.
English → English (WordNet) Definition: Rn Rn n 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 [syn: radon, atomic number 86 ] 2: a graduate nurse who has passed examinations for registration [syn: registered nurse]
English → English (gcide) Definition: Rn Rn \Rn\, n. (Chem.) the symbol for the chemical element radon. [PJC]