| Abbreviation | Definition |
|---|---|
| CYBER | Changing Yesterday's Behavior For Enhanced Results |
| CYCLES | Cyclone Extratropical Storms |
| CYGNSS | The Cyclone Global Navigation Satellite System |
| CZ | Cane-Zebiak |
| CZ | Coastal Zone |
| CZ | Convection Zone |
| CZCS | Coastal Zone Color Scanner |
| CZE | Capillary Zone Electrophoresis |
| CZM | Coastal Zone Management |
| CZMA | Coastal Zone Management Act |
| CZMP | Costal Zone Management Plan |
| D | Deep |
| D | Depth |
| DAAC | Distributed Active Archive Center |
| DAC | Data Assembly Center |
| DAN | Divers Alert Network |
| DAO | Departmental Administrative Order |
| DARC | Device for Automatic Remote Data Collection |
| DARE | Denver AWIPS Risk Reduction and Requirements Evaluation |
| DART | Deep-ocean Assessment and Reporting of Tsunamis project |