| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |
|---|---|
| OFD | object-film distance; occipital frontal diameter; oro-facial-digital [syndrome] |
| OH | hydroxycorticosteroid; obstructive hypopnea; occipital horn; occupational health; occupational histo... |
| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
| OTS | occipital temporal sulcus; orotracheal suction |