| Abbreviation | Definition |
|---|---|
| CIS | Computer Integrated Surgery |
| CISP | Chronic Intractable Shoulder Pain |
| CIT | Collagen Induction Therapy |
| CITR | Citrate |
| CIU | Chronic Idiopathic Urticaria |
| CJ | Collusive Joint |
| CJD | Creutzfeldt-Jakob Disease |
| CJPP | Canadian Journal of Physiology and Pharmacology |
| CJSCA | Central Jersey Spinal Cord Association |
| CK | Check |
| CK | Conductive Keratoplasty |
| CKD | Cyclical Ketogenic Diet |
| CKMM | creatine kinase muscle isoform |
| CL | Chlorine |
| CL | Clavicle |
| CL | Clean |
| CL | Closed |
| CL | Contact Lens |
| CLA | Clamp |
| CLA | Codependent Love Addiction |