| TSU | triple sugar urea [agar] |
|---|---|
| UC | ulcerative colitis; ultracentrifugal; umbilical cord; unchanged; unclassifiable; unconscious; undiff... |
| UCE | urea cycle enzymopathy |
| UCL | ulnar collateral ligament; upper collateral ligament; upper confidence limit; upper control limit; u... |
| UFFI | urea formaldehyde foam insulation |
| UN | Urea nitrogen |
|---|---|
| UNA | Urea nitrogen appearance |
| UUN | Urinary urea nitrogen |
| BUN | urea nitrogen |