Delphin \Del"phin\, Delphine \Del"phine\, a. [See {Dauphin}.] Pertaining to the dauphin of France; as, the Delphin classics, an edition of the Latin classics, prepared in the reign of Louis XIV., for the use of the dauphin (in usum Delphini). Delphin \Del"phin\, n. [L. delphinus a dolphin.] (Chem.) A fatty substance contained in the oil of the dolphin and the porpoise; -- called also {phocenin}.