| UMPK | uridine monophosphate kinase |
|---|---|
| UMPS | uridine monophosphate synthase |
| UP | parallax unsharpness; ulcerative proctitis; ultrahigh purity; unipolar; upright posture; ureteropelv... |
| UPase | uridine phosphorylase |
| UR | unconditioned reflex; upper respiratory; uridine; urinal; urology; utilization review |