Rn \Rn\, n. (Chem.)
   the symbol for the chemical element radon.
   [PJC]

	

	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]

	

	45 Moby Thesaurus words for "RN":
   LPN, Naval Construction Battalion, Royal Navy, Seabees, USN,
   United States Navy, argosy, armada, charge nurse, coast guard,
   district nurse, division, escadrille, fleet, flotilla,
   graduate nurse, licensed practical nurse, marine, merchant fleet,
   merchant marine, merchant navy, mosquito fleet, naval forces,
   naval militia, naval reserve, navy, nurse, nursing sister,
   practical nurse, private-duty nurse, probationer, probationist,
   probe, public health nurse, registered nurse, school nurse,
   scrub nurse, sister, squadron, student nurse, surgical nurse,
   task force, task group, trained nurse, visiting nurse