| SCO | sclerocystic ovary; somatic crossing-over; subcommissural organ |
|---|---|
| SOSF | single organ system failure |
| SSO | sequence-specific oligonucleotide [probe]; Society of Surgical Oncology; special sense organ |
| TO | old tuberculin; oral temperature; original tuberculin; target organ; telephone order; thoracic ortho... |
| UNOS | United Network for Organ Sharing |