temporary capital; provisional capital
Refers to a city that serves as the capital on a temporary basis, often during wartime, political transition, or emergency.
During the war, the government moved the temporary capital to a regional city.
首都 is the permanent capital, while 臨時首都 is a temporary or provisional capital.
臨時政府 is a provisional government, often associated with a temporary capital.
Compound of 臨時 (temporary, provisional) and 首都 (capital).