| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
|---|---|
| ref | reference; reflex |
| refl | reflex |
| RIP | radioimmunoprecipitation; reflex inhibiting pattern; respiratory inductance plethysmography |
| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |