| Abbreviation | Definition |
|---|---|
| CTMBL | Cloud-Topped Marine Boundary Layer |
| CTOH | Centre for Topographic studies of the Oceans and Hydrosphere |
| CTR | Cavitation Tendancy Ratio |
| CTS | Communications Technology Satellite |
| CTSCREEN | Complex Terrain Screening |
| CU | Currency Units |
| CUBE | Combined Uncertainty and Bathymetry Estimation |
| CUC | Computer Users Committee |
| CUE | Coastal Upwelling Experiment |
| CUEA | Coastal Upwelling Ecosystems Analysis |
| CVP | Central Valley Project |
| CVS | Cathodic Voltametry Stripping |
| CW | Clean Water |
| CWB | Central Weather Bureau |
| CWBS | China Water Beetle Survey |
| CWR | Centre for Water Research |
| CWRA | Canadian Water Resources Association |
| CWSU | Central Weather Service Unit |
| CWT | Coded-Wire Tag |
| CY | Cyclone Young |