| T4(D) | serum thyroxine measured by displacement analysis |
|---|---|
| UA | absorption unsharpness; ultra-audible; ultrasonic arteriography; umbilical artery; unauthorized abse... |
| XA | xanthurenic acid; x-ray analysis |
| αHBe | Antibody against Hepatitis Be Antigen |
| αHBs | Antibody against Hepatitis B surface Antigen |