| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |
|---|---|
| UDO | undetermined origin |
| undet | undetermined |
| UO | under observation; undetermined origin; urethral orifice; urinary output |
| CEA | Carcino-Embryonic Antigen [HP 1825-6] ; Oncofetal Antigens ; Glycopro... |