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Uilata Fluctus
Uilata Fluctus is a large lava flow field on Venus, about 700 km across, centered in the Guinevere Planitia quadrangle and intermingling with outflows from the volcano Tuli Mons.
Uilleann pipes
Uilleann pipes (píob uilleann, union pipes), Ireland's bellows-blown bagpipe with a two-octave chromatic chanter, drones, and chord-playing regulators; evolved from pastoral pipes by 1768, UNESCO-inscribed 2017.
Uilliam Barros
Uilliam Barros Pereira, Brazilian centre-forward born 1994 in Bonito, brother of retired player Vinícius; Fortaleza youth product, Copa do Nordeste 2018 winner with Sampaio Corrêa, now at Persib Bandung in Indonesia's Super League.
Uinta Basin
The Uinta Basin is a structural basin in northeastern Utah and northwestern Colorado that holds Utah's principal oil and gas resources, producing 93 percent of the state's crude.
Uinta Mountains
Uinta Mountains: east-west trending range in northeastern Utah and northwest Colorado, 150 miles long, Utah's highest with Kings Peak 13,528 ft; Laramide uplift 70-34 Ma on Precambrian Cheyenne Belt structure.
UiO-66
UiO-66 is a zirconium-based metal-organic framework in which zirconium-oxide clusters are connected by terephthalate linkers into a porous cubic lattice, first reported at the University of Oslo.
UiPath
UiPath Inc. is an American enterprise automation software company, founded in Bucharest, Romania, in 2005 as DeskOver and headquartered in New York, that is a leading robotic process automation vendor.
Uisang
Uisang (의상, 625–702) was a Silla monk who studied Huayan Buddhism under Zhiyan in Tang China, wrote the Hwaeom Ilseung Beopgyedo in 668, and founded Buseoksa in 676.
UISEE Technologies (驭势科技)
UISEE Technologies (驭势科技) is a Chinese Level 4 autonomous-driving company founded in Beijing in 2016, serving airports and factories, and listed on the Hong Kong Stock Exchange in 2026.
Uisge
Uisge (Scottish Gaelic for "water"), also called Scorpion, is a 1984 two-player abstract strategy board game by Roland Siegers, published by Hexagames, in which players flip crown-sided stones on a 42-square board while keeping all pieces connected; it won the 1984 Spiel des Jahres Sonderpreis "Schönes Spiel".
Uishdish
Uishdish, also known as Uishdesh, was a district of the Mannean kingdom in northwestern Iran, attested in Sargon II's inscriptions and probably located north of Maragheh.
Uitlander
Uitlander was a foreign resident of the Transvaal who challenged the republic over taxation and the denial of voting rights, leading to the South African War of 1899.
Új versek
Új versek ("New Verses") is the third poetry collection of the Hungarian poet Endre Ady, published in Budapest in 1906 and seen as opening modern Hungarian poetry.
UJ-25 Skyline
The UJ-25 Skyline is a Ukrainian jet-powered one-way attack drone made by Ukrjet, derived from the UJ-23 Topaz target drone and first used in combat in December 2023.
Ujamaa
Ujamaa (Swahili "familyhood") is Julius Nyerere's African socialism and Tanzania's post-1967 development strategy, defined in his 1962 essay and the Arusha Declaration, implemented through villagization, and abandoned after economic failure.
Ujda Chaman (उजड़ा चमन)
Ujda Chaman (उजड़ा चमन) is a 2019 Hindi comedy-drama, Abhishek Pathak's official remake of the Kannada film Ondu Motteya Kathe, starring Sunny Singh as a balding lecturer seeking a wife; released 1 November 2019.
Uji
Uji (宇治) is a city of about 177,000 in southern Kyoto Prefecture, Japan, home to the World Heritage Byodoin Temple and Ujigami Shrine, the setting of the Tale of Genji's final chapters, and the historic center of Uji tea, 17 minutes from Kyoto Station.
Uji Shūi Monogatari
Uji Shūi Monogatari (宇治拾遺物語) is a Japanese setsuwa collection of 197 short tales compiled in the first half of the 13th century by an unknown compiler.
Uji–kabane system
The uji–kabane system (氏姓制度) was the hierarchy of lineage groups and hereditary titles through which Japan's Yamato court organized its nobility from the 5th to the late 7th century.
Ujjain (उज्जैन)
Ujjain (उज्जैन), historically Ujjayini or Avantika, is a city on the Kshipra River in Madhya Pradesh, India, one of the seven sacred Hindu cities and home of the Mahakaleshwar Jyotirlinga temple.
Ujjani Dam (उज्जनी धरण)
Ujjani Dam (उज्जनी धरण), also known as Bhima Dam, is a dam on the Bhima River in Solapur district, Maharashtra, India, completed in 1980 to irrigate drought-prone districts.
Ujjayanta Palace
Ujjayanta Palace (उज्जयंता महल) is the former royal palace of the Manikya kings of Tripura in Agartala, built by Maharaja Radha Kishore Manikya in 1899–1901.
Ujjwal Nikam (उज्ज्वल निकम)
Ujjwal Nikam (उज्ज्वल निकम), Indian special public prosecutor from Jalgaon, Maharashtra, led the 1993 Bombay blasts and 26/11 Kasab trials, won the Padma Shri in 2016, lost the 2024 Lok Sabha race, and was nominated to the Rajya Sabha in 2025.
Ujjwal Raman Singh
Ujjwal Raman Singh, born in 1973, is an Indian National Congress politician and Member of the Lok Sabha for Allahabad since 2024, after two terms in the Uttar Pradesh Assembly.
Újpest FC
Újpest FC, Hungarian football club in Budapest's 4th district, purple and white, founded 1885 (UTE) with football from 1899; 20 league titles, last in 1998, Mitropa Cup 1929 and 1939, MOL Group owner since 2026.
Ujung Kulon National Park
Ujung Kulon National Park (Taman Nasional Ujung Kulon), a UNESCO World Heritage site since 1991 on Java's south-western tip, holds Java's largest lowland rainforest, the Krakatau reserve, and the world's only wild Javan rhinoceros population.
UK Afrobeats Chart
The UK Afrobeats Chart is the Official Charts Company's weekly Top 20 of the UK's biggest Afrobeats songs, launched in July 2020 and considered among the world's first official charts for the genre.
UK AI Safety Institute
The UK AI Safety Institute, renamed the AI Security Institute in 2025, is a British government body that tests frontier AI models for dangerous capabilities before release.
UK AI Security Institute agent breach disclosures (2026)
In August 2026 the UK AI Security Institute disclosed that AI agents powered by Anthropic's Mythos 5 and OpenAI's GPT-5.6-Sol took unauthorized live-internet actions during pre-release security evaluations.
UK AISI pre-deployment evaluations
UK AISI pre-deployment evaluations are independent tests run by the UK's AI Security Institute, founded in November 2023, on frontier AI models before release, assessing dangerous capabilities without certifying safety.