| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |
|---|---|
| UHDDS | uniform hospital discharge data set |
| ZD | zero defects; zero discharge; zinc deficiency |
| INR | International Normalized Ratio = RISI &... |
| OPD | Out-Patient Department; 외래 |