| JSATO2 | jugular vein oxygen saturation |
|---|---|
| MVOS | mixed venous oxygen saturation |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| OSM | ovine submaxillary mucin; oxygen saturation meter |
| P-50 | oxygen half-saturation pressure |