| RC | an electronic circuit containing a resistor and capacitor in series; radiocarpal; reaction center; r... |
|---|---|
| SBS | shaken baby syndrome; short bowel syndrome; sick building syndrome; sinobronchial syndrome; small bo... |
| ser | series, serial |
| S | Greek capital letter sigma; syphilis; summation of series |
| SPA | salt-poor albumin; sheep pulmonary adenomatosis; sperm penetration assay; spinal progressive amyotro... |