| ROS | reactive oxygen species; review of systems; rod outer segment |
|---|---|
| ROSS | review of subjective symptoms |
| RRC | residency review committee; risk reduction component; routine respiratory care; Royal Red Cross; rur... |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |