| Abbreviation | Definition |
|---|---|
| NIVA | North of Ireland Veterinary Association |
| NJVMA | New Jersey Veterinary Medical Association |
| NLPA | National Livestock Producers Association (USA) |
| NM | Non-Migrating |
| NMC | National Mastitis Council |
| NMPF | National Milk Producers Federation |
| NMVMA | New Mexico Veterinary Medical Association |
| NMWA | New Mexico Wildlife Association |
| NOAH | AVMA Network of Animal Health |
| NOAH | National Office of Animal Health |
| NOAH | New Opportunities For Animal Habitats |
| NOBD | Nicroc Oxide BlooD |
| NOC | Not Otherwise Classed |
| NORINA | Norwegian Reference Centre for Laboratory Animal Science & Alternatives |
| NOSS | National Ovary Sterilization Service |
| NPA | National Pig Association |
| NPVC | North Peace Veterinary Clinic |
| NPVG | New Providence Veterinary Group, P. A. |
| NPW | National Pet Week |
| NRA | National Registration Authority for Agricultural and Veterinary Chemicals ( Australia) |