| Abbreviation | Definition |
|---|---|
| NRAAC | National Reptile and Amphibian Advisory Council |
| NRPB | National Radiological Protection Board |
| NRVR | National Recognition of Veterinary Registration |
| NSA | National Sheep Association |
| NSAVA | Norwegian Small Animal Veterinary Association |
| NSDC | National Service Dog Center |
| NSH | National Society for Histotechnology (USA) |
| NSHA | National Swedish Herpetological Association |
| NSPCA | National Council of Societies for the Prevention of Cruelty to Animals ( South Africa) |
| NSVE | North Surrey Veterinary Emergencies |
| NTF | National Trainers Federation (racehorses) |
| NUVAC | National Unit for the Veterinary Advancement of Communications Skills |
| NUVAC | National Unit for the Veterinary Advancement of Communications Skills (joint project between Liverpool University and Veterinary Defence Society) |
| NV | Nasonia Vitripennis |
| NV | Non-Vampire |
| NVA | National Veterinary Associates |
| NVA | Neighborhood Veterinary Associates |
| NVAL | National Veterinary Assay Laboratory (Japan) |
| NVB | National Veterinary Board |
| NVDS | National Veterinary Diagnostic Services |