| Acronym | Meaning |
| DEF | Dose Effect Factor |
| BTS | British Toxicology Society |
| APOE | Apolipoprotein E |
| SMA | Specific Methanogenic Activity |
| G2 | Gaussian-two (an Ab Initio Mo Theory For Mol. Energies Calcn.) |
| D-CI | Double Excitations In Configuration Interaction |
| APCVD | Atm.-pressure Chem. Vapor Deposition |
| IDP | Interplanetary Dust Particle |
| IAGC | International Association Of Geochemistry And Cosmochemistry |
| ELO | Edge Localized Orbital |