| Acronym | Meaning |
| FWHM | Full Width At Half Maximum |
| LRAT | Long-range Atmospheric Transport |
| GAR | Grain Aspect Ratio |
| CEFIC | Associazione Europea Dell'industria Chimica |
| DIOS | Direct Iron Ore Smelting |
| RSCF | Relativistic Self-consistent Field |
| NNLO | Next-to-next-to-leading Order |
| MSMO | Multiple Scattering Molecular Orbital Method (also Known As X(alpha) Scattered-wave) |
| ELEED | Elastic Low Energy Electron Diffraction |
| WSD | Wear Scar Diameter |