| Abbreviation | Definition |
|---|---|
| CLD | Clinical Liver Disease |
| CLDF | Children's Liver Disease Foundation |
| CLI | Critical Limb Ischemia |
| CLRD | Chronic lower respiratory disease |
| CLRD | Chronic Lower Respiratory Diseases |
| CLSD | Craniolenticulosutural Dysplasia |
| CLT | Chronic Lymphocytic Thyroditis |
| CMBD | Cell and Molecular Basis of Disease |
| CMBD | Cellular and Molecular Basis of Disease |
| CMBD | Center for Metabolic Bone Disease |
| CMCD | Center for Managing Chronic Disease |
| CMD | Coronary Microvascular Disease |
| CMDR | Center for Metabolic Disease Research |
| CMDR | Center for Musculoskeletal Disease Research |
| CMTC | Cutis Marmorata Telangiectatica Congenita |
| CMTD | Charcot–Marie–Tooth Disease |
| CNCLD | Colombo North Centre for Liver Diseases |
| CNDD | Center for Neural Development and Disease |
| CNDM | Centre of Neurological Disease Models |
| CNDR | Canadian Neuromuscular Disease Registry |