| Acronym | Meaning |
| GIT | Gastrointestinal Tract |
| MDD | Maximum Daily Dose |
| RVCM | Renormalized Virtual-crystal Method (for Electronic Structure) |
| PBDD | Polybrominated Dibenzodioxin(s) |
| PPG | Pike's Peak Granite (USGS Rock Standard) |
| BWR | Boiling Water Reactor |
| WALTZ | Wonderful Alternating Phase Technique For Zero Residual Splittings |
| QSPR | Quantitative Structure Property Relationship |
| LLW | Low-Level Waste |
| ISAS | Japanese Institute Of Space And Astronomical Science |