| Acronym | Meaning |
| EDCF | Endothelium-derived Contracting Factor |
| KHN | Knoop Hardness |
| STXM | Scanning Transmission X-ray Microscope |
| TON | Turnover No. Of The Reaction |
| ETS | Environmental Tobacco Smoke |
| CHIEF | Clearinghouse For Inventories And Emission Factors |
| VBCI | Valence Bond Configuration Interaction |
| PBB | Polybrominated Biphenyl |
| PES | Potential Energy Surface |
| MQO | Measurement Quality Objective |