Commercial bank.
Commercial bank. A bank, whether or not a member of the Federal Reserve System, which has access to the Federal Reserve Communications System (FRCS) or Fedwire. The FRCS or Fedwire is a communications network that allows Federal Reserve System member banks to effect a transfer of funds for their customers (or other commercial banks) to the Treasury Account at the Federal Reserve Bank of New York.
Source
27 CFR § 25.11
Scoping language
When used in this part, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms have the meanings given in this section.