a title given to the eldest son of France, and heir presumptive of the crown, on account of the province of Dauphiny, which, in 1343, was given to Philip of Valois, on this condition, by Humbert dauphin of the Viennois.

DAUPHIN-FORT, a fort built by the French, on the eastern coast of the island of Madagascar, E. long. 48°, and S. lat. 24°.