| Abbreviation | Definition |
|---|---|
| NMRL | Nuclear Medicine Research Lab |
| NMRR | National Medical Research Register |
| NMRR | National medical research registry |
| NMS | Neuroleptic malignant syndrome |
| NNRC | Native Northeast Research Collaborative |
| NNRC | Nianin NeuroRehabilitation Research Comlex |
| NNRC | Nutraceutical and Nutrition Research Centre |
| NNRC | Nutrition and Neutraceutical Research Centre |
| NNRG | Nianin NeuroRehabilitation Research Group |
| NNRI | National Nuclear Research Institute |
| NOR | No Original Research |
| NORA | National Occupational Research Agenda |
| NORA | National Oilheat Research Alliance |
| NORA | The National Oilheat Research Alliance |
| NORC | National Opinion Research Center |
| NORC | Naval Ordinance Research Calculator |
| NORC | Naval Ordnance Research Calculator |
| NORC | Nutrition Obesity Research Center |
| NORC | Nutrition Obesity Research Centers |
| NORD | National Organization for Rare Disorders |