| Acronym | Meaning |
| PO-MO | Pars Orbital-MO |
| PEDRI | Proton-electron Double-resonance Imaging |
| PO | Polarization Orbital |
| GRAS | Generally Recognized As Safe |
| RAST | Radioallergosorbent Test (immunoassay) |
| TOPSE | Tropospheric Ozone Production About The Spring Equinox |
| TSA | Trichostatin A |
| LPM | Liters Per Minute |
| CRU | Constitutional Repeating Unit |
| THTR | Thorium High Temperature Reactor |