15-letter words containing u, g, a, r, i
- urban migration — the process of people moving from rural areas to cities
- urban sociology — the sociological study of cities and their role in the development of society.
- uropygial gland — a gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers.
- utility program — system software used to perform standard operations, as sorting data or copying data from one file to another, for application programs or other system software.
- virtual storage — a system whereby addressable memory is extended beyond main storage through the use of secondary storage managed by system software in such a way that programs can treat all of the designated storage as addressable main storage.
- vulgar fraction — common fraction.
- walpurgis night — (especially in medieval German folklore) the evening preceding the feast day of St. Walpurgis, when witches congregated, especially on the Brocken.