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Meaning of Greenback party

Green'back par"ty

Pronunciation: [key]
— U.S. Hist. U.S. Hist.
  1. a former political party, organized in 1874, opposed to the retirement or reduction of greenbacks and favoring their increase as the only paper currency.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.