| Abbreviation | Definition |
|---|---|
| RWL | Royal White Lion |
| RXV | Veterinary Prescription |
| S | Snail |
| S/N | Serial Number |
| SA | Specific Animal |
| SAC | Scottish Agricultural College |
| SAC | Scottish Agricultural Colleges |
| SACAR | Specialist Advisory Committee on Antimicrobial Resistance (of Department of Health, UK government) |
| SACO | Swedish Confederation of Professional Associations |
| SAE | Siamese Algae Eater |
| SAF | Small Abattoir Federation |
| SAGs | Scientific Advisory Groups |
| SAMW | Scottish Association of Meat Wholesalers |
| SAPAM | Small Animal Practitioners' Association of Malaysia |
| SARDA | Search and Rescue Dog Association |
| SART | State Animal Response Team |
| SASAS | South African Society of Animal Science |
| SASBLIA | South African Stud Book and Livestock Improvement Association |
| SAVA | South African Veterinary Association |
| SAVAB | Small Animal Veterinary Association of Belgium |