| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
|---|---|
| CFR | case-fatality ratio; citrovorum-factor rescue; Code of Federal Regulations; complement-fixation reac... |
| QR | quality review; quantity is correct [Lat. quantum rectum]; quieting response; quinaldine red |
| qr | quadriradial; quantity is correct [Lat. quantum rectum]; quarter |
| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |