| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |
|---|---|
| SO | salpingo-oophorectomy; Schlatter-Osgood [test]; second opinion; sex offender; spheno-occipital [sync... |
| SOM | secretory otitis media; sensitivity of method; serous otitis media; somatotropin; state operations m... |