| UMP | uridine monophosphate |
|---|---|
| UMPH | uridine 5'-monophosphate phosphohydrolase |
| UMPK | uridine monophosphate kinase |
| UMPS | uridine monophosphate synthase |
| UMS | urethral manipulation syndrome |
| UMT | units of medical time |
| UN | United Nations; 국제연합 |
| UN | ulnar nerve; undernourished; unilateral neglect; urea nitrogen; urinary nitrogen |
| UNa | urinary sodium |
| UNAI | uniform needs assessment for posthospital care |