folding money

1. American folding money is green, of uniform size and design, with a picture of a dead President on it.
   美国的纸钞呈绿色，大小和样式都是统一的，上面绘有一位已故总统的肖像。
2. A flat pocket-sized folding case, usually made of leather, for holding paper money, cards, or photographs; a billfold.
   口袋大小的平的折叠小包，常以皮革制成，用来装纸钱、卡片或像片等；钱包。

noun

1. currency issued by a government or central bank and consisting of printed paper that can circulate as a substitute for specie

   Synonym:    paper moneypaper currency