| Abbreviation | Definition |
|---|---|
| NVHT-LACERTA | Nederlandse Vereniging voor Herpetelogie en Terrariumkunde ' Lacerta' ( Dutch Herpetology Society ' Lacerta') |
| NVI | National Veterinary Inistitute |
| NVI | National Veterinary Institute |
| NVI | Norwegian Veterinary Institute |
| NVIR | National Veterinary Research Institute |
| NVMA | Nebraska Veterinary Medical Association |
| NVRI | National Veterinary Research Institute |
| NVRI | Natonal Veterinary Research Institute |
| NVS | National Veterinary Stockpile |
| NWF | National Wildlife Federation (USA) |
| NWRA | National Wildlife Rehabilitators Association |
| NYS | New York Silver |
| NZVA | New Zealand Veterinary Association |
| O | In veterinary animal medical records O' , refers to owner of animal Ex: " O' checked dogs feet |
| O | Ostrich |
| OAVT | Ontario Association of Veterinary Technicians |
| OC | Original Cub |
| OCBB | Orange County Bird Breeders |
| ODA | Oklahoma Department of Agriculture |
| OES | Old English Sheepdog |