| SNRTd | sinus node recovery time, direct measuring |
|---|---|
| SNRTi | sinus node recovery time, indirect measuring |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| SRR | standardized rate ratio; surgery recovery room |
| SRT | sedimentation rate test; simple reaction time; sinus node recovery time; sitting root test; speech r... |