| Acronym | Meaning |
| USPIO | Ultrasmall Superparamagnetic Iron Oxide |
| CCA | Close-coupling Approximation |
| IRIS | Incorporated Research Institutes For Seismology |
| LOESS | Locally Weighted Smoothers [in Modeling] |
| CCV | Continuing Calibration Verification |
| ECE | Electrical Conductivity Of Saturation Extract (soils) |
| APLI | Atmospheric Pressure Laser Ionization |
| IRED | Ion Radiation-enhanced Diffusion |
| EST | External Standardization Technique |
| SPIO | Superparamagnetic Iron Oxide |