| ACU | acquired cold urticaria; acute care unit; agar colony-forming unit; ambulatory care unit |
|---|---|
| COLD | A cold agglutinin titer |
| 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 |
| DDU | dermo-distortive urticaria; duplex Doppler ultrasound |