| Acronym | Meaning |
| PAPP-A | Pregnancy-associated Plasma Protein A |
| RCR | Respiratory Control Ratio |
| ICDD | International Center For Diffraction Data |
| DWS | Drinking Water Standard |
| NCRDS | National Coal Resources Data System |
| AMNH | American Museum Of Natural History |
| QDPT | Quasi-degenerate Perturbation Theory |
| CRHF | Complex-restricted Hartree-Fock |
| GSI | Gonadosomatic Index |
| PCOS | Polycystic Ovary Syndrome |