| Acronym | Definition | 
|---|
| CCDU➣Claremont Colleges Debate Union (est. 1953; California) | 
| CCDU➣Corpus Christi Ducks Unlimited (Corpus Christi, TX) | 
| CCDU➣Coastal Command Development Unit (UK) | 
| CCDU➣Color-Coded Doppler Ultrasonography | 
| CCDU➣Color-Coded Doppler Ultrasound |