U
| -ula | small, minute |
| -ule | small, minute |
| uln/o | ulna (lower arm bone on opposite side of thumb) |
| ultra- | excess, beyond |
| -um | structure, thing |
| umbilic/o | umbilicus, navel |
| ungu/o | nail |
| uni- | one |
| ur/o | urine, urinary tract |
| ureter/o | ureter |
| urethr/o | urethra |
| -uria | urine |
| urin/o | urine, urinary tract |
| -us | condition; structure |
| uter/o | uterus (womb) |
| uvul/o | uvula |
