| SAN | sinoatrial node; sinoauricular node; slept all night; solitary autonomous nodule |
|---|---|
| SSR | site-specific recombination; somatosensory response; surgical supply room |
| SSU | self-service unit; sterile supply unit |
| TALL, T-ALL | T-cell acute lymphoblastic leukemia |
| UPS | ultraviolet photoelectron spectroscopy; uninterruptible power supply; uroporphyrinogen synthetase; u... |