EFDA may refer to:
*
European Fusion Development Agreement
EFDA (1999 — 2013) has been followed by EUROfusion, which is a consortium of national fusion research institutes located in the European Union and Switzerland.
The European Union has a strongly coordinated nuclear fusion research programme. At ...
*
EFDA Nations Cup, an automobile racing competition between 1990 and 1998 by the European Formula Drivers Association
*
4′-ethynyl-2-fluoro-2′-deoxyadenosine (EFdA), a nucleoside analog that potently inhibits HIV replication
{{disambig