| Acronym | Meaning |
| LOCA | Loss-of-Coolant Accident |
| NAPRI | North American Pollutant Release Inventory |
| MCSCO | Multiconfiguration Self-consistent Orbital |
| PPAR | Peroxisome Proliferator-activated Receptor |
| ICSS | Isobaric Crystallization From Supercritical Solution |
| CEEC | Capillary Electrophoresis/electrochemistry |
| SNUR | Significant New Use Rule |
| RAS | Renin-angiotensin System |
| EPI | Electronic Patent Index |
| REP | Relativistic Effective Potential |