| Acronym | Meaning |
| ICAM | Intercellular Adhesion Molecule |
| PCSFC | Packed Column Supercritical Fluid Chromatography |
| IDE | Insulin Degrading Enzyme |
| OD | Order-Disorder (in Mineral Structure) |
| EGO | Exhaust Gas Oxygen |
| ERA | Environmental Risk Assessment |
| EXGF(1) | Extended Group Function(1) (model Wave Function Accounting For Electron Correlation) |
| NPTOC | Nonpurgeable Total Organic Carbon |
| JAERI | Japanese Atomic Energy Research Institute |
| SCN | Suprachiasmatic Nucleus |