| RN | radionuclide; red nucleus; Registered Nurse; registry number; residual nitrogen; reticular nucleus |
|---|---|
| RPPR | red cell precursor production rate |
| RRC | residency review committee; risk reduction component; routine respiratory care; Royal Red Cross; rur... |
| RTR | Recreational Therapist, Registered; red blood cell turnover rate; retention time ratio |
| RVB | red venous blood |