| Acronym | Meaning |
| USANS | Ultra-small-angle Neutron Scattering |
| GRWA | Generalized Rotating-wave Approxn. (in Energy Level Calcns.) |
| PW-LDA | Plane Wave-local Density Approxn. |
| IDMS | Isotope Dilution Mass Spectrometry |
| ARM | Atmospheric Radiation Measurement |
| CTP | Cytidine 5'-triphosphate |
| VAD | Vacuum Arc Degassing |
| SMLR | Stepwise Multiple Linear Regression |
| CCGM | Cabrera-Celli-Goodman-Manson (at. Scattering Theory) |
| ROI | Reactive Oxygen Intermediate |