| ARCA | type genus of the family Arcidae: ark shells and blood clams |
|---|---|
| ARCA | a structure composed of a series of arches supported by columns |
| ARCA | a covered passageway |
| ARCA | a department of Greece in the central Peloponnese |
| ARCA | an inhabitant of Arcadia |
| ARCA | used of idealized country life |
| ARCA | the dialect of Ancient Greek spoken by Arcadians |
| ARCA | requiring secret or mysterious knowledge |
| ARCA | information known only to a special group |