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Argadnel Regio
Argadnel Regio: IAU-approved 1,900-km regio on Europa's anti-Jovian hemisphere (adopted 2003), named for a Celtic paradise island from Bran's voyage; a "wedges" region of pull-apart bands, chaos terrain, and evidence of cryovolcanic resurfacing.
Argan oil
Argan oil, a plant oil from kernels of the endemic argan tree (Argania spinosa) of southwest Morocco; UNESCO-listed traditional extraction, oleic/linoleic-rich composition, γ-tocopherol, schottenol and spinasterol sterols, and the world's most expensive vegetable oil.
Argan, Inc.
Argan, Inc. is an American construction holding company, headquartered in Arlington, Virginia and traded on the NYSE as AGX, that builds natural gas-fired and renewable power plants through subsidiaries including Gemma Power Systems.
Arganeraie Biosphere Reserve
Arganeraie Biosphere Reserve (Réserve de biosphère de l'Arganeraie), UNESCO MAB site designated 1998 in southwestern Morocco; 2,499,970 ha of endemic argan forest across Marrakech-Safi and Souss-Massa, home to about 3 million people and Amazigh Agdal and Tanast resource-management systems.
Arganthonios
Arganthonios, also spelled Arganthonius (Spanish Argantonio), is the semi-legendary king of the Tartessians in Herodotus, said to have reigned 80 years and lived 120, and known for aiding the Phocaeans.
Argas persicus
Argas persicus (fowl tick, poultry tick, blue bug), a soft tick (Argasidae, Oken 1818) parasitizing chickens, ducks, and geese worldwide in warm climates; vector of Borrelia anserina (avian spirochetosis) and Aegyptianella pullorum, distinct from Argas reflexus, the pigeon tick.
Argatroban
Argatroban is a synthetic, reversible direct thrombin inhibitor given by intravenous infusion for thrombosis in adults with heparin-induced thrombocytopenia; the first antithrombin agent approved, in 2000.
Argead dynasty (ργεάδαι)
Argead dynasty (Ἀργεάδαι, Argeadai), also called Temenidae, the royal house of ancient Macedonia from Perdiccas to Alexander IV; Philip II and Alexander the Great; ended by Cassander's murders.
Argemone
Argemone, prickly poppy (Mexican poppy, Argemone mexicana), a Papaveraceae genus of 33 spiny yellow-sapped herbs native to the Americas and Hawaii; A. mexicana seed oil causes epidemic dropsy.
Argemone mexicana
Argemone mexicana (Mexican prickly poppy, cardo santo), a prickly annual Papaveraceae herb native to Central America, pantropical weed and medicinal plant whose sanguinarine-rich seed oil causes epidemic dropsy when it adulterates mustard oil.
Argent (band)
Argent: English progressive rock band formed in 1969 by ex-Zombies keyboardist Rod Argent with Russ Ballard, Jim Rodford, and Bob Henrit; known for "Hold Your Head Up" (No.5, 1972) and "God Gave Rock 'N' Roll to You", later covered by Kiss; active 1969-1976, seven studio albums.
Argentavis
Argentavis, or Argentavis magnificens, the giant teratorn, an extinct Miocene bird of Argentina described in 1980; heaviest known flying bird at about 70 kg with a 6–7 m wingspan, an obligate thermal and slope soarer, exceeded in wingspan only by Pelagornis sandersi.
Argentea Planum
Argentea Planum: IAU-approved (2003) broad smooth valley on Mars near the south pole, center −72.49°, 298.33° E, diameter about 1370 km, within the Hesperian Dorsa Argentea Formation.
Argenteuil
Argenteuil, Val-d'Oise sous-préfecture on the Seine northwest of Paris; INSEE code 95018. 106,130 inhabitants (2023), former wine town and abbey, Monet's residence 1872–1878, major industrial suburb by 1930, Métropole du Grand Paris member.
Argentina
Argentina (República Argentina), southern South American presidential republic, capital Buenos Aires. Independent from Spain 9 July 1816; area 2,780,400 sq km; GDP about US$640 billion; Freedom House rating Free, 85/100.
Argentina anserina
Argentina anserina (silverweed, silverweed cinquefoil; formerly Potentilla anserina) is an allotetraploid stoloniferous Rosaceae perennial of temperate wetlands across the Northern Hemisphere, invasive in Patagonia, IUCN least concern.
Argentina at the FIFA World Cup
Argentina at the FIFA World Cup: La Albiceleste's record of 19 appearances, three titles (1978, 1986, 2022), seven finals, and a runner-up finish at the 2026 World Cup under Lionel Scaloni.
Argentina Menis
Argentina Menis (1948-2023), Romanian discus thrower, Dinamo București; 1972 Munich Olympic silver (65.06 m), women's discus world record 67.32 m (23 Sep 1972 to May 1973), nine-time national champion, sixth at Montreal 1976.
Argentina national football team
Argentina national football team (Albiceleste), AFA men's team, CONMEBOL. Three World Cups (1978, 1986, 2022), runner-up 1930, 1990, 2014, 2026; 16 Copa América titles; coached by Lionel Scaloni, captained by Lionel Messi.
Argentina national rugby union team
Los Pumas, Argentina's men's national rugby union team (UAR), first played in 1910; nicknamed after a 1965 South Africa tour crest mix-up. Third at RWC 2007, Rugby Championship side since 2012.
Argentina national under-20 football team
Argentina national under-20 football team (Selección Sub-20), AFA youth side; record six FIFA U-20 World Cup titles (1979, 1995, 1997, 2001, 2005, 2007), five South American U-20 championships, runner-up to Morocco at Chile 2025, coach Diego Placente.
Argentina national under-23 football team
Argentina national under-23 football team (Selección Olímpica), AFA's Olympic men's side: nine Olympic appearances, gold at Athens 2004 and Beijing 2008, silver at Amsterdam 1928 and Atlanta 1996; U-23 plus three overage players.
Argentina v England (1986 FIFA World Cup)
Argentina v England, 1986 FIFA World Cup quarter-final, 22 June 1986 at Estadio Azteca, Mexico City; Argentina won 2-1 with Maradona's 'Hand of God' and 'Goal of the Century' against Lineker's goal.
Argentina–Brazil football rivalry
The Argentina–Brazil football rivalry, the South American superclásico between the two national teams since 1914: over 100 FIFA-recognized matches, Argentina leading most counts, key meetings in the 1990 World Cup, Copa América finals, and 2020s qualifying.
Argentina, 1985
Argentina, 1985 is a 2022 Argentine courtroom drama by Santiago Mitre, starring Ricardo Darín and Peter Lanzani as prosecutors Strassera and Moreno Ocampo in the Trial of the Juntas; Golden Globe winner and Oscar nominee for Best International Feature.
Argentine Air Force
Fuerza Aérea Argentina (FAA), the Argentine Air Force, independent armed service since 4 January 1945 with roots in the 1912 Military Aviation School; 24 F-16s bought from Denmark in 2024, 12 delivered by 2026.
Argentine ant
Argentine ant (Linepithema humile, formerly Iridomyrmex humilis), a small dull-brown tramp ant native to South America's Paraná basin; a unicolonial, multi-queen supercolony former listed among the world's 100 worst invasive species, established in 40+ countries.
Argentine Army
The Argentine Army (Ejército Argentino) is the land branch of Argentina's armed forces, led by the JEMGE, with three divisions under the CAAE, garrisons in four geographic zones, and modernization under the 2026 Plan ARMA.
Argentine austral
The Argentine austral was the currency of Argentina from June 1985 to December 1991, launched under the Plan Austral to fight inflation and later replaced by the peso.
Argentine Basin
Argentine Basin: deep abyssal basin of the western South Atlantic off Argentina and Uruguay, south of the Rio Grande Rise. Formed ~138 Ma during Gondwana breakup; over 4000 m deep; hosts the Zapiola Drift and exports Antarctic Bottom Water via the Vema Channel.