national bank

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A bank in a system of federally chartered commercial banks in the United States, supervised by the Office of the Comptroller of the Currency, a department of the US Treasury.
• noun A bank controlled by or associated with a national government, especially a central bank.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a commercial bank chartered by the federal government