| 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 |