| PUVA | psoralen ultraviolet A-range |
|---|---|
| UBI | ultraviolet blood irradiation |
| UPS | ultraviolet photoelectron spectroscopy; uninterruptible power supply; uroporphyrinogen synthetase; u... |
| UV | ultraviolet; umbilical vein; ureterovesical; Uppsala virus; urinary volume |
| UVB | ultraviolet B |