| SMN | second malignant neoplasm; stathmin |
|---|---|
| SO | salpingo-oophorectomy; Schlatter-Osgood [test]; second opinion; sex offender; spheno-occipital [sync... |
| SSOP | Second Surgical Opinion Program; sequence-specific oligonucleotide probe |
| STA | second trimester abortion; serum thrombotic accelerator; superficial temporal artery |
| T + 1, T + 2, T + 3 | first, second, and third stages of increased intraocular tension |