umbilical vesicle
— Noun
– English
~ membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
Urban VI
— Noun
– English
~ Italian pope from 1378 to 1389 whose contested election began the Great Schism; he alienated his political allies by his ruthless treatment of his opponents (1318-1389)
Urban VIII
— Noun
– English
~ Italian pope from 1623 to 1644 who sanctioned the condemnation of Galileo but later freed him (1568-1644)
United States Virgin Islands
— Noun
– English
~ more than 130 southeastern Virgin Islands; a dependent territory of the United States
unit of viscosity
— Noun
– English
~ a unit of measurement for viscosity
Upper Volta
— Noun
– English
~ a desperately poor landlocked country in western Africa; was formerly Upper Volta under French rule but gained independence in 1960
uninominal voting system
— Noun
– English
~ based on the principle of having only one member (as of a legislature) selected from each electoral district
United States Civil War
— Noun
– English
~ civil war in the United States between the North and the South; 1861-1865
United States waters
— Noun
– English
~ territorial waters included within a distance of 12 nautical miles of the coasts of the United States and its territories; "ships operating in United States waters must adhere to United States laws and regulations"
U.S. waters
— Noun
– English
~ territorial waters included within a distance of 12 nautical miles of the coasts of the United States and its territories; "ships operating in United States waters must adhere to United States laws and regulations"
Ulmus campestris wheatleyi
— Noun
– English
~ a variety of the English elm with erect branches and broader leaves
upland white aster
— Noun
– English
~ tufted rigid North American perennial with loose clusters of white flowers
United States Fish and Wildlife Service
— Noun
– English
~ an agency in the Department of the Interior that conserves and protects fish and wildlife and their habitats; assesses the environmental impact of pesticides and nuclear power site and hydroelectric dams and thermal pollution
US Fish and Wildlife Service
— Noun
– English
~ an agency in the Department of the Interior that conserves and protects fish and wildlife and their habitats; assesses the environmental impact of pesticides and nuclear power site and hydroelectric dams and thermal pollution