| Abbreviation | Definition |
|---|---|
| CETS | Center for European and Transatlantic Studies |
| CETS | Centre for European and Transition Studies |
| CEUR | Center for European Union Research |
| CEV | Centre for European Volunteering |
| CEV | European Volleyball |
| CEWEP | Centre for European Waste to Energy Plants |
| CEWEP | Confederation of European Waste to Energy Plants |
| CEWI | Central European Wine Institute |
| CEWP | China Europe Water Platform |
| CEWT | Central European Winter Time |
| CEZ | Central European Zone |
| CFPE | Commercial Film Producers of Europe |
| CGWE | Coalition Governments in Western Europe |
| CHED | Centre for the History of European Discourses |
| CIDERA | Combating Infectious Diseases in the European Research Area |
| CIES | Cornell Institute for European Studies |
| CIMES | Centralising and Integrating Metadata from European Statistics |
| CIPHER | Communities of Interest to Promote the Heritage of European Regions |
| CJEU | Court of Justice of the European Union |
| CLAIRE | Confederation of Laboratories for Artificial Intelligence Research in Europe |