| rms | root-mean-square |
|---|---|
| RMSD | root-mean-square deviation |
| SNR | selective nerve root [block]; signal-to-noise ratio; substantia nigra zona reticulata; supernumerary... |
| SNRB | selective nerve root block |
| SRT | sedimentation rate test; simple reaction time; sinus node recovery time; sitting root test; speech r... |