| Abbreviation | Definition |
|---|---|
| RTT | Referral to treatment |
| RtTT | Referral to Treatment Target |
| s | atto- |
| S4BH | Standards for Better Health |
| SAC | seasonal acute conjunctivitis |
| SAC | serous adenocarcinoma |
| SAC | Sexual Addiction and Compulsion |
| SAC | Specialty Advisory Committee |
| SAC | splinting for acute closure |
| SAC | standardised assessment of concussion |
| SAC | stoma appliance customisation |
| SAC | substance abuse counsellor |
| SAD | Single Anomalous Dispersion, see SADcrystallography |
| SAD | Single Anomalous Dispersion, see SAD–crystallography |
| SAD | Sinoaortic denervation or deafferentiation |
| SAD | Subacromial decompression |
| SAD | ugar-acetone-diacetic acid test |
| SADmissingblock | Self-assessment depressionscale |
| SADmissingblock | Self-assessment depression–scale |
| SADR | serious adverse drug reaction |