| Acronym | Meaning |
| RA | Reduced Aggregate (interplanetary Dust Particle) |
| VRE | Vancomycin-resistant Enterococci |
| RAS | Returned Activated Sludge |
| CTF | Contrast-transfer Function |
| SANO | Symmetry-adapted Natural Orbital |
| CSD | Chemical Solution Deposition |
| PBL | Planet Boundary Layer (in Atmospheric Chemistry And Physics) |
| RTIL | Room-temperature Ionic Liquid |
| DWBC | Deep Western Boundary Current |
| ERL-C | Environmental Research Laboratory Corvallis |