| Abbreviation | Definition |
|---|---|
| NM | Negative Marker |
| NMC | Neo-Mitochondrial Creature |
| NMDA | N-Methyl D-Aspartate |
| NMHCC | National Managed Health Care Congress |
| NMR | Nuclear Magnetic Resonance |
| NMTS | Nutrient Management Technical Standard |
| NMTT | Nuclear Medicine Technologists of Tennessee |
| NNGA | Neural Network and Genetic Algorithm |
| NNGE | Number Needed For Genetic Effect |
| NOD | Nuclear Oligomerization Domain |
| NOEC | Normal Oropharyngeal Epithelial Cell |
| NOEC | Nose-Only Exposure Chamber |
| NOG | number of genes |
| NOMT | Naringenin 7-O-Methyl Transferase |
| NORD | National Organization for Rare Disorders |
| NP | Nucleotide Protein |
| NPCE | Non Pigmented Ciliary Epithelial |
| NPGRL | National Plant Genetic Resources Laboratory |
| NPN | Non Protein Nitrogen |
| NPT | Natural Procreative Technology |