| UA | absorption unsharpness; ultra-audible; ultrasonic arteriography; umbilical artery; unauthorized abse... |
|---|---|
| UAC | umbilical artery catheter |
| UC | ulcerative colitis; ultracentrifugal; umbilical cord; unchanged; unclassifiable; unconscious; undiff... |
| UCBC | umbilical cord blood culture |
| umb | umbilicus, umbilical |