| Abbreviation | Definition |
|---|---|
| CKEM | Compact Kinetic Energy Missile |
| CLEAN | Clean Local Energy Accessible Now |
| CLEE | Center for Law Energy the Environment |
| CLEW | Climate Land Energy and Water |
| CLOSED | Complexity Labor Overproduction Space Energy Defect |
| CME | Chamber of Minerals and Energy |
| CME | Cultivating Muscle Energy |
| CMNE | China Merchants New Energy |
| CMNE | China Minsheng New Energy |
| CMOE | Constrained Minimum Output Energy |
| CMPO | Creation Mathematics Parameter Operator (CMP-O):- The GOD’S 4 Basic Creation Mathematics Parameter O |
| CNEA | Canadian National Energy Alliance |
| CNEC | Cambridge Nuclear Energy Centre |
| CNEE | Center for a New Energy Economy |
| CNEE | Center for the New Energy Economy |
| CNEL | China New Energy Limited |
| CNEL | China New Energy Ltd |
| CNER | Centre for Nuclear Energy Research |
| COD | Commercial Operation Date |
| COEE | Center of Energy Excellence |