Vichy water /(?)/

Vi·chy wa·ter

Vichy water

prop. n.
  1. A mineral water found at Vichy, France. It is essentially an effervescent aqueous solution of sodium, calcium, and magnesium carbonates, with sodium and potassium chlorides; also, by extension, any artificial or natural water resembling in composition the Vichy water proper. Called also, colloquially, Vichy.