| Abbreviation | Definition |
|---|---|
| NFAH | Near Field Acoustic Holography |
| NFAL | Near Field Acoustic Levitation |
| NFAP | Nano Fountain Active Probe |
| N-FSBS | Near-Forward Stimulated Brillouin Scattering |
| NGB | New Grain Boundary |
| NGP | New Generation Physics |
| NGPE | National Graduate Physics Examination |
| NH | Number of Holes |
| NHE | Nuclear Hypersensitive Element |
| NICE | Nuclear Information Compendium Europe |
| NIGA | Neutron Induced Gamma Activity |
| NIM | Nuclear Interaction Module |
| NIMP | National Institute of Materials Physics |
| NIP | Negative Interdimensional Plasma |
| NL | Net Light |
| NL | No Laser |
| NL | Non-Linearly |
| NLC | Next Linear Collider |
| NLDFT | nonlocal density functional theory |
| NLM | Newton's Laws Of Motion |