| Acronym | Meaning |
| IEL | Intraepithelial Lymphocyte |
| CNDO/2D | Complete Neglect Of Differential Overlap With Deorthogonalization |
| APPM | Atomic Parts Per Million |
| TTSS | Tropospheric Trace Species Sounder |
| CONDO | Crystal Orbital Neglect Of Differential Overlap |
| RMM | Relative Molecular Mass |
| AFMR | American Federation Of Medical Research |
| CFSAN | Center For Food Safety & Applied Nutrition |
| SMM | Single-molecule Magnet |
| BMCD | Biological Macromolecule Crystallization Database |