| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |
|---|---|
| US | screen unsharpness ultrasonic, ultrasound; ultrasonography; unconditioned stimulus; unique sequence;... |
| VATER Associations | Vertebral defects Anal atresia Tracheo-Esophageal fistula ... |
| AEC | ankyloblepharon, ectodermal defects, and cleft lip [syndrome]; at earliest convenience; Atomic Energ... |
| ARBD | alcohol-related birth defects |