| Acronym | Meaning |
| NDSL | Non-Domestic Substances List |
| GNACHO | Gravitationally Neg. Anomalous Compact Halo Object |
| GRIN | Graded Index |
| API | Air Pollution Index |
| DIC | Dissolved Inorganic Carbon |
| DCIS | Ductal Carcinoma In Situ |
| NSR | Normalized Stoichiometric Ratio |
| EMDC | Elution-Modified Displacement Chromatography |
| NTO | Natural Transition Orbital Method (for Excited States) |
| MMLV | Moloney Murine Leukemia Virus |