| Abbreviation | Definition |
|---|---|
| NLO | Next-to-Leading-Order |
| NLV | Nonlinear vibration |
| NM | Nano Modified |
| NM | Newton Meter |
| Nm | Newton metre |
| NM | No Mass |
| NM | No Motion |
| NM | Non-Magnetic |
| NM | Non-Mechanical |
| NM | Non-Moment |
| NMS | Nihilistic Motion Set |
| NMT | Nuclear Materials Technology |
| NMUM | Neutron and Muon User Meeting |
| NMUO | Number of Muons |
| NMV | Net Magnetization Vector |
| NNP | Non- Neutral Plasma |
| NOE | Nuclear Overhauser Effect |
| NOL | Neutrino Oscillation Length |
| NOLR | Neutrino Oscillation Length Resonance |
| NOvA | NuMI Off-Axis Ve Appearance |