| Acronym | Meaning |
| ECPSSR | Energy-loss Coulomb-repulsion Perturbed-stationary-state Relativistic Theory |
| PSD | Passive Sampling Device(s) (for Air Pollution) |
| APRIL | A Proliferation-inducing Ligand |
| BRSV | Bovine Respiratory Syncytial Virus |
| TAC | Total Antioxidn. Capacity |
| MAPLE | Madelung Part Of Lattice Energy |
| FLCAO | Factorized LCAO |
| ROM | Reverse Osmosis Membrane |
| WENDB | Water Enforcement National Data Base |
| CLBO | Cesium Lithium Borate |