| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
|---|---|
| FA | false aneurysm; Families Anonymous; Fanconi anemia; far advanced; fatty acid; febrile antigen; femor... |
| FAI | first aid instruction; free androgen index; functional aerobic impairment; functional assessment inv... |
| FRC | Federal Radiation Council; frozen red cells; functional reserve capacity; functional residual capaci... |
| ASD | Atrial Septal Defect Types of ASD 1. Ostium Primum ASD ... |