Since not all Member States have adopted the euro as their currency, the term Eurosystem is used to describe the entity composed of the ECB and the national central banks of those Member States that have adopted the euro, currently 15.
Ós rud é nach bhfuil glactha ag gach Ballstát leis an Euro mar aonad airgeadais, baintear úsáid as an téarma Córas an Euro chun cur síos ar an aonán atá comhdhéanta den BCE agus bainc cheannais na mballstát a bhfuil glactha acu leis an Euro, 15 faoi láthair.