Monometallism

noun

1. The economic theory or practice of using only one metal as a monetary standard.
2. The use of only one metal as a standard of value in the coinage of a country; also, the economic theory that advocates such a single standard. See bimetallism.
3. The legalized use of one metal only, as gold, or silver, in the standard currency of a country, or as a standard of money values. See bimetallism.
4. The use of only one metal (such as gold or silver) in the standard currency of a country, or as a standard of monetary value.