| Abbreviation | Definition |
|---|---|
| CWO | Check With Order |
| CWO | Cash With Order |
| CWP | Childbirth Without Pain |
| CWPC | Central Water and Power Commission |
| CWPCP | Chico Water Pollution Control Plant |
| CWPCPEP | Chico Water Pollution Control Plant Expansion Project |
| CWPRS | Central Water and Power Research Station |
| CWQG | Canadian Water Quality Guidelines |
| CWR | Continuous Wave Radar |
| CWS | Cotton-Wool Spots |
| CWS | Caution and Warning Status |
| CWS | Caution and Warning System |
| CWS | Certified Wound Specialist |
| CWSU | Caution and Warning Status Unit |
| CWSU | Condensate Water Servicing Unit |
| CWSU | Central Weather Service Unit |
| CWWG | Crop Weather Watch Group |
| CX | Cervix |
| CX | Chest X Ray |
| CX | Consciousness |
| CX OLEV | ConeXpress Orbital Life Extension Vehicle |
| CXBR | Cosmic X-ray Background Radiation |
| CXR | Chest X Ray |
| CXRO | Center for X-Ray Optics at Berkeley |
| CYP | Children and Young Persons |
| CYSB | Cape York Space Base |
| CYSF | Cape York Space Facility |
| CZCS | Coastal Zone Color Scanner |
| CZE | Capillary Zone Electrophoresis |
| CZI | Count Zero Interrupt |
| CZMP | Coastal Zone Management Plan |
| CZZC | Convert Zone to Zip Code |