| Acronym | Meaning |
| NLC | Noctilucent Cloud |
| BOA | Bond Orbital Approximation |
| GDL | Glow Discharge Lamp |
| RIHRA | Research To Improve Health Risk Assessments Program (US EPA) |
| IEPA | Illinois Environmental Protection Agency |
| HMPAM | Hydrophobically Modified Polyacrylamide |
| RCI | Restricted Configuration Interaction |
| PARS | Photoacoustic Raman Spectroscopy |
| APUHF | Approximately Projected Unrestricted Hartree-Fock |
| SPS | Spark Plasma Sintering |