519,064 articles
Ualalapi
Ualalapi is a 1987 historical novel by Mozambican writer Ungulani Ba Ka Khosa, telling through a Nguni warrior the life of Ngungunhane, last ruler of the Gaza Empire.
UALink
UALink (Ultra Accelerator Link) is an open interconnect standard letting AI accelerators like GPUs directly access each other's memory, developed by a consortium including AMD, Google, and Microsoft.
Ualli
Ualli was a king of Mannea, a kingdom in the Zagros mountains of western Iran, who took the throne with Assyrian support after his father Ahsheri was assassinated.
Uanga
Uanga (Feitiço, Spell) is a 1951 novel by the Angolan writer Óscar Bento Ribas, a folkloric romance portraying the customs of Luanda and blending fiction with ethnography.
Uanhenga Xitu
Uanhenga Xitu, pen name of Agostinho André Mendes de Carvalho (1924–2014), was an Angolan writer and MPLA politician whose best-known work, "Mestre" Tamoda (1974), satirized colonial assimilation.
Uanui Virgae
Uanui Virgae, a 917-km virga (dark linear streak) feature on Titan at 45.2°N, 235.3°W, IAU-approved April 5, 2010 and named for the Māori Great Rain god Uanui.
Uapaca
Uapaca (sugar plum genus) is a Phyllanthaceae genus of dioecious African and Madagascan trees; U. kirkiana, the miombo sugar plum, is a prized edible-fruit and timber tree of southern Africa.
Uapaca guineensis
Uapaca guineensis (rikio, sugar plum) is a West and Central African Phyllanthaceae tree of wet tropical forests, used for local construction timber, raw edible fruit, and traditional medicine; IUCN least concern.
Uar Bernard
Uar Bernard, Nigerian defensive tackle for the Philadelphia Eagles, drafted No. 251 overall in round 7 of the 2026 NFL Draft via the International Player Pathway program; never played organized football before the NFL.
Uasin Gishu
Uasin Gishu is a county in Kenya's Rift Valley, headquarters Eldoret (city), population 1,163,158, area 3,345.2 km2. Kenya's breadbasket for maize and wheat, home of champion long-distance runners, devolved unit since 2010.
Uatu
Uatu the Watcher is a Marvel Comics character who observes Earth from the Moon and often breaks his race's oath of non-interference to help heroes like the Fantastic Four.
UAU (group)
UAU (유아유, You Are You) is the first subunit of K-pop girl group Dreamcatcher, formed by JiU, SuA, and Yoohyeon; it debuted May 28, 2025 with Playlist #You Are You and returned July 1, 2026 with Playlist #Your Youth.
UAV photogrammetry
UAV photogrammetry is a remote sensing method that reconstructs 3D terrain models, point clouds, and orthophotos from overlapping drone images, using structure from motion algorithms.
Uaxaclajuun Ubaah K'awiil
Uaxaclajuun Ubaah K'awiil, also known as 18 Rabbit, was the 13th king of the Maya city of Copán from 695 to 738, noted for its monumental sculpture.
Uaxactun
Uaxactun is an ancient Maya archaeological site in the Petén region of northern Guatemala, discovered by Sylvanus Morley in 1916 and conquered by its rival Tikal in 378 AD.
UAZ (УАЗ)
UAZ, from the Russian for Ulyanovsk Automobile Plant, is a Russian automaker in Ulyanovsk known since 1941 for the UAZ-469, Bukhanka van, and Patriot SUV.
UAZ-452
The UAZ-452, popularly known as the Bukhanka (Буханка) for its loaf shape, is a Soviet and Russian four-wheel-drive van built by UAZ since 1965 and still in production.
UAZ-469
The UAZ-469 is a Soviet four-wheel-drive light utility vehicle produced by the Ulyanovsk Automobile Plant from 1972, replacing the GAZ-69 and serving military and civilian roles in over 80 countries.
UB City
UB City is a mixed-use complex of office towers, luxury retail, and serviced apartments on Vittal Mallya Road in central Bengaluru, India, developed by the UB Group and Prestige Group.
Ub Iwerks
Ub Iwerks (Ubbe Ert Iwwerks, 1901–1971), American animator who animated the first Mickey Mouse cartoons at 700 drawings a day, founded Iwerks Studios (Flip the Frog), and invented the multiplane camera, Xerox animation, and optical printing at Disney.
UB-221
UB-221 (CUE-221, Ascendant-221) is a humanized anti-IgE IgG1 monoclonal antibody, humanized from mouse clone 8D6, that binds IgE Cε3, neutralizes free IgE, and uniquely spares CD23-mediated IgE downregulation; in Phase 2 CSU trials it beat placebo and outperformed omalizumab.
Ub(...)uum
Ub(...)uum is the conventional name for an ancient Roman road station in the territory of the Arverni in Gallia Aquitania, known today only from a damaged entry on the Tabula Peutingeriana.
UB40
UB40, British reggae-pop band formed in Birmingham in 1978, named after the UK unemployment benefit form. Known for Signing Off, Labour of Love, and Red Red Wine; over 100 million records sold; split into two rival versions after Ali Campbell's 2008 exit.
UBA1
UBA1 (UBE1, A1S9) is the main human E1 ubiquitin-activating enzyme, X-linked at Xp11.23, essential for viability, and the gene whose somatic mutation in blood cells causes VEXAS syndrome.
UBA2
UBA2 (SAE2) is the catalytic subunit of the UBA2/SAE1 heterodimer, the sole SUMO-specific E1 activating enzyme that initiates SUMOylation via ATP-dependent SUMO adenylation and Cys173 thioester transfer to Ubc9; its loss causes SHFM/ACCES malformations and its overexpression drives cancers.
Ubadah ibn al-Samit
Ubadah ibn al-Samit (عبادة بن الصامت) was a companion of Muhammad of the Khazraj tribe of Medina, a veteran of Badr, and a hadith narrator who died in 34 AH.
Ubaid period
Ubaid period (c. 5900–4000 BC; also 5500–4000 BC), Mesopotamian Late Neolithic–Early Chalcolithic culture named for Tell al-'Ubaid near Ur, defined by black-on-buff painted pottery, irrigation farming, tripartite temples, and phases Ubaid 0–4.
Ubaid Shah
Ubaid Shah, Pakistani right-arm fast-medium bowler born 2006 in Lower Dir, brother of Naseem Shah; starred at the 2024 U19 World Cup (18 wickets), played PSL for Islamabad United, Multan Sultans and Lahore Qalandars, and debuted in Tests for Pakistan in August 2026.
Uballissu-Marduk
Uballissu-Marduk was a Babylonian accountant and administrator who served the Kassite king Kurigalzu in the fourteenth century BC, known from seal inscriptions and later land grants.
Ubangi-Shari
Ubangi-Shari (French Oubangui-Chari), French colony in central Africa from 1894, separated from French Congo in 1903, part of French Equatorial Africa; became the Central African Republic in 1958 and independent 13 August 1960.