| resp | respiration, respiratory; response |
|---|---|
| RRI | recurrent respiratory infection; reflex relaxation index; relative response index |
| RRT | random response technique; Registered Respiratory Therapist; relative retention time |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| RT | radiologic technologist; radiotelemetry; radiotherapy; radium therapy; rapid tranquilization; reacti... |