| CU | cardiac unit; casein unit; cause unknown or undetermined; chymotrypsin unit; clinical unit; color un... |
|---|---|
| IC | icteric, icterus; immune complex; immunoconjugate; immunocytochemistry; immunocytotoxicity; impedanc... |
| IOU | intensive care observation unit; international opacity unit |
| ACU | acquired cold urticaria; acute care unit; agar colony-forming unit; ambulatory care unit |
| HU | heat unit; hemagglutinating unit; hemolytic unit; Hounsfield unit; human urine, human urinary; hydro... |