| Abbreviation | Definition |
|---|---|
| ST | stress test |
| ST | subacute thyroiditis |
| ST | sulphathiazole |
| ST | sulphotransferase |
| ST | superior temporal |
| ST | supratentorial |
| ST | surface tension |
| ST | Surgical Technician |
| ST | Surgical Technologist |
| ST | sympathetic trunk |
| ST | synovial tissue |
| ST1 | Specialty trainee, first year |
| ST2 | Specialty trainee, second year |
| ST3 | Specialty trainee, third year |
| STA | second trimester abortion |
| STA | Specialist Training Authority |
| STA | standard tube agglutination |
| STA | Staphylococcus aureus |
| STA | sulfotransferase A |
| STA | superficial temporal artery |