| Abbreviation | Definition |
|---|---|
| CK | Conductive Keratoplasty |
| CK | Clinical Knowledge |
| CK | Calf Kidney |
| CK | Chicken Kidney |
| CK-MB | Creatine Kinase MB Isoenzyme |
| CKAFS | Cape Kennedy Air Force Station |
| CKD | Cyclical Ketogenic Diet |
| CKD | Chronic Kidney Disease |
| CKD | Canada Knock Down |
| CKD | Certified Kitchen Designer |
| CKD | Cement Kiln Dust |
| CKDS | Cryptographic Key Data Set |
| CKMB | Creatine Kinase Muscle Band |
| CKO | Chief Kid Officer |
| CKRA | Cape Kennedy Reference Atmosphere |
| CKRC | Cement Kiln Recycling Coalition |
| CKS | Classic Form Of Kaposi Sarcoma |
| CL | Casual Leave |
| CL | Chlorine |
| CL | Command Language |
| CL | Chloride |
| CL | Contact Lens |
| CL | Clamp |
| CL | Caseous Lymphadenitis |
| CL | Clinical Leaflet |
| CL | Certified Lymphologist |
| CL | Childhood Leukemia |
| CL | Chronic Leukemia |
| CL | Composite Lymphoma |
| CL | Cash Latency |
| CLA | Compressed Liquid Approximation |
| CLA | Conjugated Linoleic Acid |
| CLA | Constant Linear Address |
| CLA | Call Listing Agent |
| CLA | Computerized Lifestyle Assessment |
| CLAD | Censored Least Absolute Deviation |
| CLADR | Class Life Asset Depreciation Range |
| CLAES | Cryogenic Limb Array Etalon Spectrometer |
| CLAI | Congreso Latinoamericano de Auditoria Interna |
| CLAIM | Community Leaders Assisting the Insured of Missouri |
| CLAMS | Chesapeake Lighthouse and Aircraft Measurements for Satellites |
| CLAN | Civic Local Affairs Network |
| CLAN | Christians Linked Across The Nation |
| CLAP | Carbohydrates, Lipid, Nucleic Acid, Protein |
| CLAP | Chrome Leather Accessories And Paint |
| CLAS | Culturally and Linguistically Appropriate Services |
| CLASP | Christian Link Association Of Single Parents |
| CLASP | Consortium Of Local Authorities Special Programme |
| CLASS | Computer Literacy and Studies in Schools |
| CLASS | Computer Literacy and Studies in School |