| Acronym | Meaning |
| LOAEL | Lowest Observed Adverse Effect Level |
| ZTS | Z Transition State [z = Nuclear Charge] (method For Calcg. Isoelectronic Energy Differences And Electrostatic Potentials For A |
| VLF | Very Low Frequency (radiowaves) |
| MATI | Mass-analyzed Threshold Ionization Spectroscopy |
| EPT | Exponential Perturbation Theory |
| TRIS | Toxic Release Inventory System |
| CCS | Corrected Coupled-states (method For Mol.-scattering Calcns.) |
| IWKB | Iterated Wentzel-Kramers-Brillouin |
| CDF | Cumulative Distribution Functions |
| PKA | Protein Kinase A |