| QED | quantum electrodynamics |
|---|---|
| ql | as much as desired [Lat. quantum libet] |
| qp | as much as desired [Lat. quantum placeat] |
| QR | quality review; quantity is correct [Lat. quantum rectum]; quieting response; quinaldine red |
| qr | quadriradial; quantity is correct [Lat. quantum rectum]; quarter |