| Abbreviation | Definition |
|---|---|
| CISAB | Center for the Integrative Study of Animal Behavior |
| CIST | Cambridge Institute Of Science And Technology |
| CITES | Convention on International Trade in Endangered Species of Wild Fauna and Flora |
| CIWF | Compassion in World Farming |
| CKC | Continental Kennel Club |
| CLA | Country Landowners' Association |
| CLAD | Canine Leukocyte Adhesion Deficiency |
| CLEVB | Central Laboratory for Evaluation of Veterinary Biologicals |
| CLEVB | Central Laboratory for Evaluation of Veterinary Biologics |
| CLIVE | Computer-aided Learning In Veterinary Education |
| CLR | Canadian Llama Registry |
| CMG | Caudal Mesenteric Ganglion |
| CMK | Crabbet Maynesboro Kellogg |
| CMRG | Central Mastitis Review Group (of the VLA) |
| CNADA | condiional approval of new animal drug application |
| CNAH | Centre for North American Herpetology |
| CNARR | Center for North American Amphibians and Reptiles (University of Kansas) |
| CNITV | Centre National d'Informations Toxicologiques Veterinaires |
| CNVS | Central Nebraska Veterinary Service |
| COGECA | General Committee for Agricultural Co-operation in the European Union |