| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
|---|---|
| OT | objective test; oblique talus; occlusion time; occupational therapist, occupational therapy; ocular ... |
| OTU | olfactory tubercle; operational taxonomic unit |
| CR | calculation rate; calculus removed; calorie-restricted; cardiac rehabilitation; cardiac resuscitatio... |
| CRL | cell repository line; Certified Record Librarian; complement receptor location; complement receptor ... |