| Acronym | Definition |
|---|
| ANCA | Armenian National Committee of America |
| ANCA | Adirondack North Country Association |
| ANCA | Anti-Neutrophil Cytoplasmic Antibody (medical) |
| ANCA | Australian National Choral Association |
| ANCA | Australian Nature Conservation Agency |
| ANCA | Army Nurse Corps Association |
| ANCA | Airport Noise and Capacity Act |
| ANCA | Association of Nature Center Administrators |
| ANCA | Association of North Carolina Alphamen |
| ANCA | Anniston Chemical Activity (US Army) |
| ANCA | Associazione Nazionale Consulenti Ambientali |
| ANCA | Allied Naval Communications Agency (NATO) |
| ANCA | Armenian National Committee of Australia |
| ANCA | Associazione Nazionale Consumatori ed Ambiente |
| ANCA | Australian Numerical Control and Automation |