| Acronym | Definition |
|---|
| RCDA | Roman Catholic Diocese of Albany (Albany, New York) |
| RCDA | Risk-and Cost Driven Architecture (computing) |
| RCDA | Research Career Development Award (various organizations) |
| RCDA | Richmond County District Attorney (New York) |
| RCDA | Religion in Communist Dominated Areas (journal) |
| RCDA | Ring Christlich Demokratischer Akademiker (German: Ring of Christian Democratic Academics; est. 1951; Berlin, Germany) |
| RCDA | Research Capacity Development Awards (Trent Research and Development Support Unit; UK) |
| RCDA | Recurrent Chronic Dissecting Aneurysm (cardiovascular medicine) |