| Acronym | Meaning |
| MPB | Morphotropic Phase Boundary |
| BSA | Breathing-sphere Approxn. (for Inelastic Mol. Collisions) |
| TIRF | Total Internal Reflectance Fluorescence |
| CERT | Const. Extension Rate Tensile |
| NTI | Negative Thermal Ionization (for Mass Spectrometry) |
| DVR | Discrete Variable Representation (in Wave Function Calcn.) |
| QDO | Quantum-defect Orbital (theory) |
| SEE | Secondary Electron Emission |
| AOS | Alpha Olefin Sulfonate (surfactant) |
| FEE | Field Electron Energy |