IPA: //doʊˈfæn//
KK: /ˈdoʊfɪn/
The firstborn son of the king of France, who held a special title and was next in line for the throne.
The dauphin was expected to become the future king of France.
Dauphin originates from Old French *dauphin*, meaning dolphin, which was used as a title for the heir apparent to the French throne. The term is derived from the Latin *delphinus* (meaning dolphin), reflecting the emblem of the dolphin used by the Counts of Vienne, who were the first to adopt the title.
Think of the dolphin as a symbol of royalty, which helps you remember that 'dauphin' refers to the heir to the French throne.