| C/D | cigarettes per day; cup to disc ratio |
|---|---|
| c/d | cigarettes per day |
| CDT | carbohydrate-deficient transferrin; carbon dioxide therapy; Certified Dental Technician; children's ... |
| CPPD | calcium pyrophosphate dihydrate deposition [syndrome]; cisplatin; cost per patient day |
| 1/d | once a day |