| IU | immunizing unit; international unit; intrauterine; in utero; 5-iodouracil |
|---|---|
| KU | kallikrein unit; Karmen unit |
| LU | left upper [limb]; loudness unit; Lupron; lytic unit |
| MICU | medical intensive care unit; mobile intensive care unit |
| mIU | milli-international unit; one-thousandth of an international unit |