rn
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 radon
Related terms: chemical_element noble_gas
2. [ noun ] (medicine,work) a graduate nurse who has passed examinations for registration
Synonyms: registered_nurse
Related terms: nurse np nurse-midwife
Similar spelling:   RNA