| CTRL | Control |
|---|---|
| CTRS | Conner's Teacher Rating Scale |
| CTRX | Ceftriaxone |
| CTT | Cefotetan |
| CTT | Colonic transit time |
| CTT | Computerized Transaxial Tomography |
| CTV | Citrus Tristeza Virus |
| CTV | Clinical Target Volume |
| CTVS | Canine transmissible venereal sarcoma |
| CTX | C-telopeptide |