| Acronym | Meaning |
| MPL | Maximum Permitted Level |
| HAL | Health Advisory Level |
| BIA | Biospecific Interaction Analysis |
| PTR | Proton Transfer Reaction |
| SIFCA | Slurry-infiltrated Fiber Castable [ceramic Casting Technique] |
| LEEBI | Low Energy Electron Beam Irradiation |
| PV-RR | Perturbational-variational-Rayleigh-Ritz (matrix Method In Mol. Calcns.) |
| EEXAPS | Electron Excited X-ray Appearance Potential Spectroscopy |
| NDDN | National Dry Deposition Network (US EPA) |
| PWIA | Plane-wave Impulse Approximation |