American Heritage Dictionary of the English Language, 5th Edition
Dual Sentence Examples
It was dark, the dual moons high in the sky.
Clever. It serves a dual purpose.
Rumania was little affected by the political changes in the Balkan Peninsula (1908-10) coincident with the Turkish revolution, the annexation of Bosnia and Herzegovina by the Dual Monarchy, the proclamation of Bulgarian independence and the erection of Montenegro into a kingdom.
The dual mesh is cut in a round patch along the outer circle.
It was opposed by Austria as tending to create a new and formidable Slavonic nation within the Dual Monarchy, and by Hungary as a menace to Magyar predominance in Transleithania.