| UM | movement unsharpness; upper motor [neuron]; uracil mustard; utilization management |
|---|---|
| UMA | ulcerative mutilating acropathy; upright membrane assay; urinary muramidase activity |
| Umax | maximum urinary osmolality |
| umb | umbilicus, umbilical |
| UMC | unidimensional chromatography; university medical center |
| UMCV-TO | ulnar motor conduction velocity across thoracic outlet |
| UMDNS | Universal Medical Device Nomenclature System |
| UME | undergraduate medical education |
| UMI | urinary meconium index |
| UMKase | uridine monophosphate kinase |