| FEF50 | forced expiratory flow at 50% of forced vital capacity |
|---|---|
| FIF50 | forced inspiratory flow at 50% of forced vital capacity |
| EA | early antigen; educational age; egg albumin; electric affinity; electrical activity; electroacupunct... |
| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
| PVA | Paralyzed Veterans of America; peripheral venous alimentation; polyvinyl acetate; polyvinyl alcohol;... |