| URI | Upper Respiratory Infection; 상기도 감염 |
|---|---|
| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |
| URK | urokinase |
| URL | uniform resource locator |
| URN | uniform resource name |
| URO | urology; uroporphyrin; uroporphyrinogen; utilization review organization |
| URO-GEN | urogenital |
| UROD | uroporphyrinogen decarboxylase |
| Urol | urology, urologist |
| UROS | uroporphyrinogen synthase |