Pangloss, fictional character, the pedantic and unfailingly optimistic tutor of Candide, the protagonist of Voltaire’s novel Candide (1759), a satire on philosophical optimism. The name Pangloss—from the Greek elements pan-, “all,” and glōssa, “tongue”—suggests glibness and garrulousness. A barbed caricature of the German philosopher and mathematician G.W. Leibniz and his followers, Pangloss has become a symbol of foolhardy optimism.