| OFD | object-film distance; occipital frontal diameter; oro-facial-digital [syndrome] |
|---|---|
| ofd | object-film distance |
| OLE | object linking and embedding |
| OMT | object modeling technique; ocular microtremor; O-methyltransferase; ophthalmic medical technician or... |
| ORT | object relations technique; operating room technician; oral rehydration therapy |