| ASOS | American Society of Oral Surgeons |
|---|---|
| COC | cathodal opening contraction; coccygeal; combination oral contraceptive |
| COCP | combined oral contraceptive pill |
| COGTT | cortisone oral glucose tolerance test |
| COS | cheiro-oral syndrome; chief of staff; Clinical Orthopaedic Society; clinically observed seizures |
| OFDS | Oral-Facial-Digital syndromes |
|---|---|
| ROU | Recurrent oral ulcer |
| TOPV | Trivalent oral poliovaccine |
| PO | per oral |