| CU | cardiac unit; casein unit; cause unknown or undetermined; chymotrypsin unit; clinical unit; color un... |
|---|---|
| CUS | carotid ultrasound examination; catheterized urine specimen; contact urticaria syndrome |
| EACD | eczematous allergic contact dermatitis |
| ECH | educator contact hour |
| FCH | faculty contact hour; family case home; fetal cystic hygroma |