| 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 |
| PGO | ponto-geniculo-occipital [spike] |
| PO | by mouth, orally [Lat. per os]; parieto-occipital; parietal operculum; period of onset; perioperativ... |