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Arqamani
Arqamani, also rendered Ergamenes, was a king of Kush who ruled from Meroe in the third century BC and is the only Meroitic king named in classical literature.
Arqiva
Arqiva is a British communications infrastructure and media services company based in Winchester, England, operating the transmission networks carrying UK terrestrial television, radio, and smart-metering services.
Arquebus
The arquebus, also spelled harquebus, was a shoulder-fired matchlock gun and the standard infantry firearm of sixteenth-century Europe, first fired around 1414 and used until about 1720.
Arraba, Israel
Arraba (ʿArrabet al-Baṭṭuf; Arabic عرابة البطوف) is an Arab town in the central Lower Galilee, Israel, identified with the ancient Jewish town of Gabara, or Arav, prominent at the time of the Great Revolt against Rome.
Arrábida Biosphere Reserve
Arrábida Biosphere Reserve (Reserva da Biosfera da Arrábida), a UNESCO biosphere reserve designated 27 September 2025 in Hangzhou, covering 20,153 hectares of Palmela, Sesimbra, and Setúbal, Portugal's 13th such reserve.
Arracacia xanthorrhiza
Arracacia xanthorrhiza (arracacha, Peruvian parsnip) is an Andean Apiaceae herb domesticated about 3000 years ago for its starchy storage root, grown at 600–3600 m in Brazil, Colombia, and other Andean countries, propagated by cormels.
Arrack
Arrack (also spelled arak) is a South and Southeast Asian distilled spirit made from coconut-palm sap, sugarcane, rice, or fruit; related to but distinct from Middle Eastern anise arak, with Sri Lanka and Batavia arrack as leading styles.
Arrah, Bihar
Arrah (Ara, आरा), Bihar, headquarters of Bhojpur district, formerly of Shahabad; known for the 1857 Siege of Arrah and Kunwar Singh; 120.10 km NH-119A corridor approved 2025.
Arraial do Pavulagem (Belém)
Arraial do Pavulagem is a musical and cultural collective from Belém, Pará, founded in 1987, best known for the Arrastão, free June street corteges opening with a fluvial procession.
Arraignment
Arraignment is the first court hearing in a criminal case, where the defendant learns the charges, is advised of rights including appointed counsel, and enters a guilty or not-guilty plea; deadlines, bail, and remote practice vary by jurisdiction.
Arrakis
Arrakis, later Rakis, is the desert planet of Frank Herbert's Dune (1965), sole source of the spice melange, home of the Fremen and sandworms, and the keystone of the Dune universe's ecology and economy.
Arrakis Planitia
Arrakis Planitia is a 337.40 km-wide plain on Titan at 78.4°S, 117°W, IAU-approved in 2010 and named after the Dune planet Arrakis; a Cassini-observed 2004 rain event darkened 34,000 km² of it.
Arrambam (ஆரம்பம்)
Arrambam (ஆரம்பம்), a 2013 Tamil action thriller directed by Vishnuvardhan, stars Ajith Kumar as Ashok, an officer exposing a bulletproof-vest scam with hacker Arjun (Arya); released 31 October 2013, music by Yuvan Shankar Raja.
Arran (Caucasus)
Arran (Arrān, al-Rān, Armenian Ałvankʿ) was a region of eastern Transcaucasia between the Kura and Araxes rivers, the heart of pre-Islamic Caucasian Albania, later an Islamic frontier province ruled by the Mihranids, Sajids, Mosaferids, and Shaddadids until the name fell out of use after the Mongol sack of Baylaqān in 1221.
Arran Dokal
Arran Dokal is a UK cancer scientist and Chief Technology Officer of Kinomica, a Queen Mary University of London spin-out developing phosphoproteomic diagnostics to predict cancer drug response.
Arran gas field
The Arran gas field is a UK Central North Sea gas and condensate field, discovered in 1985 and brought on stream by Shell in September 2021.
Arran UNESCO Global Geopark
Arran UNESCO Global Geopark covers the Isle of Arran, Scotland, designated 17 April 2025 as the UK's 10th UNESCO Global Geopark. Known as Scotland in Miniature, it spans about 1,000 km², records 600 million years of geology, and centers on the Highland Boundary Fault and Hutton's Unconformity.
Arráncame la Vida
Arráncame la Vida is a 2008 Mexican period drama directed by Roberto Sneider, following a young woman who marries a powerful, corrupt general in 1930s Puebla.
Arranged marriage
Arranged marriage, also called prearranged marriage, is a marriage in which families lead the choice of partner, while consent formally remains with the couple, distinguishing it from forced marriage.
Arranged Marriage (music)
"Arranged Marriage" is a 1992 single by Birmingham's Apache Indian, fusing bhangra with ragga reggae in his bhangramuffin style; it peaked at number 16 on the UK chart in 1993.
Arranged marriage in the Indian subcontinent
Arranged marriage in the Indian subcontinent is marriage arranged primarily by parents or family matchmakers, remaining the predominant form of marriage in India, Pakistan, Bangladesh, and Nepal.
Arrangement of lines
An arrangement of lines is the partition of the plane induced by a finite set of straight lines into vertices, edges, and faces, fundamental to computational geometry.
Arras
Arras, prefecture of Pas-de-Calais in Hauts-de-France, France; formerly Nemetacum and a Spanish Netherlands stronghold until 1640. Known for its UNESCO belfry and Vauban citadel, baroque Grand'Place, and the 1917 Battle of Arras.
Arras-sur-Rhône Roman Milestone
Two Gallo-Roman milestones from Arras-sur-Rhône, Ardèche, dated c. 285/286 and c. 308/311, 2.45 m tall, marking roads of the civitas of Vienne; classified 1926, moved to Tournon-sur-Rhône in 1939.
Array calibration
Array calibration is the family of methods that estimates and corrects errors in sensor position, timing, and gain and phase response across arrays of receivers.
Array comparative genomic hybridization
Array comparative genomic hybridization, or array CGH, is a cytogenetic method that detects DNA copy-number gains and losses genome-wide, with far finer resolution than karyotyping.
Array programming
Array programming, also called array-oriented programming, is a paradigm where operations apply to whole arrays and matrices instead of single elements, pioneered by Kenneth Iverson's APL.
Array tomography
Array tomography is a microscopy method, introduced by Micheva and Smith in 2007, that cuts resin-embedded tissue into ultrathin serial sections and images them repeatedly to reconstruct three-dimensional volumes.
Arrayed waveguide grating
The arrayed waveguide grating (AWG), also called a waveguide grating router or PHASAR, is a planar optical device that splits and combines wavelength channels in DWDM fiber networks.
Arrayed waveguide lens
An arrayed waveguide lens (AWL) is a planar optical device in which an array of single-mode waveguides acts as a lens, focusing light on a chip.