The term "Dollar Bill" commonly refers to the paper currency of the United States that is worth one dollar. It features the portrait of George Washington, the first President of the United States, on the front. The back of the bill displays the Great Seal of the United States, which includes an eagle and a shield. Dollar bills are part of the U.S. currency system, which includes other denominations such as five-dollar bills and twenty-dollar bills. They are widely used for everyday transactions and are recognized for their green color, often referred to as "greenbacks."