| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
|---|---|
| CI | cardiac index; cardiac insufficiency; cell immunity; cell inhibition; cephalic index; cerebral infar... |
| CL | capillary lumen; cardiolipin; cell line; centralis lateralis; chemiluminescence; chest and left arm ... |
| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |
| OET | oral endotracheal tube; oral esophageal tube |