| Acronym | Meaning |
| NUR | Nitrate Utilization Rate |
| CIRAC | Canadian Institute For Research In Atmospheric Chemistry |
| AVS | Acid Volatile Sulfide |
| GFN | Grain Fineness Number |
| FWE | Faddeev-Watson Expansion (for T-operator In Atomic Collisions) |
| ZQC | Zero-quantum Coherence |
| IBSCA | Ion Beam Spectrochemical Analysis |
| QFEB | Quasi-free Electron Bremsstrahlung |
| EMSL | Environmental Monitoring And Support Laboratory |
| EFCE | European Federation Of Chemical Engineers |