All articles starting with U

Ursula Thiess

Ursula Thiess (Ursula Schmidt, 1924–2010), German-born Hollywood actress discovered by Howard Hughes for RKO; starred in Monsoon (1952), married Robert Taylor in 1954, then left acting.

Ursula von der Leyen, German CDU politician, President of the European Commission since 2019 and its first woman president; former German defence, labor, and family minister; re-elected July 2024 for a second term to 2029.

Sep 21, 2026

Ursula W. Goodenough

Ursula W. Goodenough is an American cell and developmental biologist at Washington University in St. Louis, known for her work on the sexual cycle of the green alga Chlamydomonas reinhardtii.

Ursus

Ursus is the bear genus (family Ursidae) holding the brown, polar, American black, and Asiatic black bears; type species U. arctos, polar-brown sister split Middle Pleistocene, brown bears hibernate 5-7 months.

Ursynów

Ursynów, a large southern Warsaw residential district (about 148,000 residents, 48.6 sq km), incorporated 1951, independent since 1994, served by five M1 metro stations and the Kabaty Forest.

Sep 27, 2026

Urszula Zielińska

Urszula Zielińska is a Polish politician who has served in the Sejm since 2019 and as Secretary of State in the Ministry of Climate and Environment since December 2023.

Urtak

Urtak, also called Urtaku, was king of Elam from about 675 to 664 BC, first allied with Assyria, then at war with Ashurbanipal, dying after invading Babylonia in 664 BC.

Urtenu

Urtēnu was a high-ranking official and merchant of the Late Bronze Age kingdom of Ugarit, active under its last two kings in the 13th and 12th centuries BC.

Urtenu archive

The Urtenu archive is a corpus of about 650 cuneiform tablets excavated since the 1980s at Ras Shamra, ancient Ugarit in Syria, dating to roughly 1225–1185 BC and including royal correspondence.

Urtica

Urtica (nettles), genus of stinging-haired herbs in Urticaceae, Rosales, first published 1753; about 50-69 accepted species, subcosmopolitan except Antarctica; includes U. dioica and U. urens, used as food and medicine.

Urtica dioica

Urtica dioica, stinging nettle, common nettle: a dioecious rhizomatous perennial herb of Urticaceae native from Europe to Siberia and NW Africa, with silica-mineralized stinging hairs injecting histamine and acetylcholine, used as food, fiber, and herbal medicine.

Urtica urens

Urtica urens, the small or burning nettle, is an annual stinging herb up to 60 cm tall, native to the Old World and now almost cosmopolitan.

Urticaceae

Urticaceae, the nettle family (order Rosales), is a family of about 59 genera and roughly 2,100 to 2,600 species of herbs, shrubs, and trees, often with stinging hairs and cystoliths; includes Urtica, Boehmeria, Pilea, Elatostema, and the former Cecropiaceae.

Urticarial vasculitis

Urticarial vasculitis (UV), also hypocomplementemic urticarial vasculitis (HUV, ICD-11 4A44.91), is a rare small-vessel leukocytoclastic vasculitis with wheals lasting over 24 hours, bruising, and complement-based NUV/HUV subtypes.

Urticating hair

Urticating hair (urticating seta): barbed defensive hair of New World tarantulas (Theraphosidae), shed by leg-scratching or contact; seven types I–VII, up to 10,000 per mm², absent in Old World species, causing skin and eye irritation.

Oct 22, 2026

Urtiin duu

Urtiin duu, meaning long song, is a Mongolian traditional folk genre tied to nomadic pastoral life, proclaimed a UNESCO Masterpiece in 2005 and inscribed on the Representative List in 2008.

Uru

Uru (ウル) is a Japanese singer-songwriter who debuted in 2016 on Sony Music after posting about 100 cover videos on YouTube, known for anime and drama theme songs.

Uru Island

Uru Island, also written Ururu Island, is a small island off the eastern coast of Malaita Island, near Kwalakwala and Ato'ifi in Malaita Province, Solomon Islands.

Oct 22, 2026

URu2Si2

URu2Si2 is a uranium-based heavy-fermion intermetallic compound, best known for its mysterious "hidden order" phase transition at 17.5 K, which has defied explanation for roughly four decades.

Urua

Urua, also written Uru'aza, is a city of Elam in southwestern Iran, first attested in inscriptions recording that Eannatum of Lagash captured and burned it.

Uruapan

Uruapan, municipality and city in Michoacán, Mexico; Purépecha name meaning "eternal spring"; founded by fray Juan de San Miguel around 1533; second most populous Michoacán municipality (356,786 in 2020) and center of the avocado industry; mayor Carlos Manzo assassinated in 2025.

Oct 22, 2026

Urubhanga

Urubhanga (ऊरुभङ्ग, "the breaking of the thighs") is a one-act Sanskrit play attributed to Bhāsa, dramatizing Duryodhana's final hours after Bhima shatters his thighs in a mace duel.

Uruguay

Uruguay (Oriental Republic of Uruguay), a South Atlantic country of 3.4 million people, high-income since 2012, with Latin America's largest middle-class share, agriculture-based exports, and 99% renewable electricity.

Uruguay national football team

Uruguay national football team, La Celeste, men's team of the AUF; winner of the first 1930 World Cup, the 1950 Maracanazo, four FIFA-recognized world titles, 15 Copa América titles, coached by Marcelo Bielsa.

Uruguay Round

The Uruguay Round was the eighth GATT trade negotiation round, running from 1986 to 1994, that created the World Trade Organization and extended trade rules to services and intellectual property.

Uruguay v Brazil (1950 FIFA World Cup)

Uruguay v Brazil (Maracanazo), 16 July 1950, Maracanã, Rio: Uruguay beat hosts Brazil 2-1 (Schiaffino 66', Ghiggia 79') in the decisive final-group match, Brazil needing only a draw, before about 200,000 spectators, winning Uruguay's second World Cup.