| Abbreviation | Definition |
|---|---|
| NAPPA | Nucleic Acid Programmable Protein Array |
| NAPQI | N-acetyl-p-benzoquinone imine |
| NAPS | Nucleic Acid Production Service |
| NASBA | Nucliec Acid Sequence Based Amplification |
| NAST | Nucleic Acid Simulation Tool |
| Nb | Niobium |
| NBC | Non-Biased Centered |
| NBC | Nuclear Biological and Chemical |
| NBC | Nuclear Biological Chemical |
| NBO | Natural Bond Orbital |
| NBS | N-bromosuccinimide |
| NBSC | Nitride-Bonded Silicon Carbide |
| nBuLi | n-Butyllithium |
| NC | Nickel Cadmium |
| NC | Nitro Cellulose |
| NC | Non-Catalysed |
| NC | Not Counted |
| NCA | Network Console on Acid |
| NCB | Nuclear Chemical and Biological |
| NCCA | National Chemical Credit Association |