| Abbreviation | Definition |
|---|---|
| SIA | small intestine atresia |
| SIA | sperm-immobilising activity |
| SIA | Spinal Injuries Association |
| SIA | stress-induced analgesia |
| SIA | stretch-induced arrhythmia |
| SIA | Structured Intermittent Auscultation |
| SIA | subacute infectious arthritis |
| SIA | Subintimal angioplasty |
| SIA | Survivors of Incest Anonymous |
| SIC | self intermittent catheterisation |
| SIC | serum insulin concentration |
| SIC | soluble immune complex |
| SIC | specific inhalation challenge |
| SIC | State Insurance Commission |
| SIC | Statement of Internal Control |
| SIFTRXX | Service Increment for Teaching and Research (SIfTR) |
| SIG | solution integration group |
| SIG | systems integration group |
| SIGNXX | Scottish Intercollegiate Guidelines Network |
| SIMS | Serious Incident Management System |