| Abbreviation | Definition |
|---|---|
| CEBAF | Continuous Electron Beam Accelerator Facility |
| CEC | California Energy Commission |
| CEC | Critical Exponential Correction |
| CED | Cohesive Energy Density |
| CEI | Comitato Elettrotecnico Italiano |
| CEM | Cascade Exciton Model |
| CEM | Colloquial Entropy Markup |
| CER | Classical Estimation Ratio |
| CER | Controlled Energy Release |
| CERN | Conseil Europ??en pour la Recherche Nucl??aire |
| CERN | Conseil European pour la Recherch?? Nucleaire |
| CERN | Conseil European pour la Recherché Nucleaire |
| CERN | Conseil Européen pour la Recherche Nucléaire |
| CES | Constant Elasticity of Substitution |
| CET | Constant Elasticity of Transformation |
| CEV | Constant Elasticity of Variance |
| CF | Cold Fusion |
| CF | Component Force |
| CF | Constant Flow |
| CF | Conversion Factor |