| SNR | selective nerve root [block]; signal-to-noise ratio; substantia nigra zona reticulata; supernumerary rib |
|---|---|
| SNRB | selective nerve root block |
| snRNA | small nuclear ribonucleic acid |
| snRNP | small nuclear ribonucleoprotein particle |
| snRP | small nuclear ribonucleoprotein polypeptide |
| snRPB | small nuclear ribonucleoprotein polypeptide B |
| snRPN | small nuclear ribonucleoprotein polypeptide N |
| SNRT | Sinus Node Recovery Time |
| SNRT | sinus node recovery time |
| SNRTd | sinus node recovery time, direct measuring |