universal veil
— Noun
– English
～ membrane initially completely investing the young sporophore of various mushrooms that is ruptured by growth; represented in the mature mushroom by a volva around lower part of stem and scales on upper surface of the cap
uterine vein
— Noun
– English
～ one of two veins on each side that arise from the uterine plexus and empty into the internal iliac vein
umbilical vein
— Noun
– English
～ a vein in the umbilical cord; returns nutrient blood from the placenta to the fetus
ulnar vein
— Noun
– English
～ any of several veins of the forearm
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)
ubetinget vigepligt
— Noun
– Danish
～ en trafikants pligt til at holde tilbage for tværg ...
Urban VIII
— Noun
– English
～ Italian pope from 1623 to 1644 who sanctioned the condemnation of Galileo but later freed him (1568-1644)
ultra vires
— Adverb
– English
～ beyond the scope or in excess of legal power or authority
ultra vires
— Adjective
– English
～ beyond the legal power or authority of a person or official or body etc; "an ultra vires contract"
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