folding money

Từ điển WordNet v3.1 - WordNet Dictionary

noun

currency issued by a government or central bank and consisting of printed paper that can circulate as a substitute for specie
• Syn:
paper money, paper currency
• Hypernyms:
currency
• Hyponyms:
fractional currency, fiat money, bill, note, government note,
bank bill, banker's bill, bank note, banknote, Federal Reserve note, greenback