| Acronym | Meaning |
| MTC | Medullary Thyroid Carcinoma |
| HOC | Halogenated Organic Carbons |
| FEFA | Fiber-optic Evanescent Field Absorption |
| PLO | Partially Localized Orbital |
| MOSMO | Maximum Overlap Symmetry Molecular Orbital |
| PARISS | Prism And Reflector Imaging Spectroscopy System |
| SHC | Selective Hydrophobic Coagulation |
| NEWS | National Surface Water Survey (USEPA) |
| DNO | Delocalized Natural Orbital |
| NATA | National Air Toxics Assessment |