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Argyll and Sutherland Highlanders
Argyll and Sutherland Highlanders (Princess Louise's): Scottish British Army line infantry regiment formed 1881 from the 91st and 93rd Foot, famous for the Thin Red Line, serving until its 2006 amalgamation into the Royal Regiment of Scotland.
Argyll Robertson pupil
The Argyll Robertson pupil, also called the Argyll Robertson phenomenon, is a small, irregular pupil that constricts to near targets but not to light, classically a sign of neurosyphilis.
Argylle
Argylle is a 2024 spy action-comedy directed by Matthew Vaughn, starring Bryce Dallas Howard, Sam Rockwell, and Henry Cavill. Apple's $200 million franchise starter flopped with $96 million worldwide, 32% on Rotten Tomatoes, and a ghostwritten Elly Conway tie-in novel.
Argyre Cavi
Argyre Cavi is a group of hollows (cavi) on Mars, IAU-approved in 1991 as an albedo name, centered near 48.3°S, 319.9°E within the Argyre impact basin.
Argyre Planitia
Argyre Planitia is the flat central plain of the Argyre impact basin in Mars' southern highlands, a large Early Noachian basin shaped by ancient lakes, glaciers, eskers, and wind, with a possible ice-covered paleolake.
Argyre Rupes
Argyre Rupes is an IAU-named scarp (rupes) on Mars in the Argyre basin rim, MC-25 quadrangle, centered near 62°S, 292°E, about 267 km across, approved 1973 from a classical albedo feature name.
Argyreia nervosa
Argyreia nervosa, Hawaiian baby woodrose or elephant creeper, is a Convolvulaceae liana native to the Indian subcontinent to Myanmar whose seeds contain 0.5–0.9% ergoline alkaloids including LSA, giving LSD-like but sedating effects.
Argyria
Argyria, from Greek argyros (silver), is permanent blue-gray skin discoloration from silver deposition, caused by colloidal silver supplements, occupational exposure, dental amalgam, or medical silver use; diagnosed by biopsy.
Argyrios N. Theofilopoulos
Argyrios N. Theofilopoulos is a Greek-trained American immunologist at Scripps Research in La Jolla, California, whose laboratory defined the genetic and interferon basis of lupus.
Argyrodite sulfide electrolyte
Argyrodite sulfide electrolyte is a crystalline lithium-ion conductor of formula Li₆PS₅X (X = Cl, Br, I), first reported in 2008 and used as the solid electrolyte in all-solid-state batteries.
Argyrodite thermoelectrics
Argyrodite thermoelectrics are silver- and copper-based chalcogenide compounds that convert heat into electricity, with a phonon-liquid electron-crystal design giving the lowest lattice thermal conductivity of any dense solid.
Argyrosomus japonicus
Argyrosomus japonicus, the mulloway or Japanese meagre (Sciaena japonica), is a large Indo-West Pacific sciaenid fish, IUCN Endangered A2bd, with spawning stocks reduced to 1.3% (South Africa) and 7.0–13% (Australia) of unfished levels.
Argyrosomus regius
Argyrosomus regius, the meagre (corvina, maigre commun), is a large Sciaenidae drum fish of the Mediterranean and West African coast, up to 2 m and 50 kg, and an emerging Mediterranean aquaculture species farmed in France, Italy, and Croatia.
Argyroxiphium sandwicense subsp. macrocephalum
Haleakalā silversword (ʻāhinahina), Argyroxiphium sandwicense subsp. macrocephalum, an endangered Asteraceae rosette endemic to Haleakalā volcano, Maui, above 2,130 m; flowers once after 3–90 years, then dies.
Arhab, Harra of
The Harra of Arhab, also known as the Sana'a volcanic field, is a volcanic field in Yemen north of Sana'a that last erupted around 500 CE.
Arhalba
Arḫalba, also Arhalbu, was a king of Ugarit in Bronze Age Syria, deposed by the Hittite king Muršili II after a reign of about two years.
Arhat
An arhat, or arahant, is a person in early Buddhism who has eradicated all defilements and reached the highest recognized level of mental liberation, ending rebirth.
ARHGEF2
ARHGEF2 (GEF-H1, Lfc) is a human chromosome 1q22 gene encoding a RhoA-specific guanine nucleotide exchange factor held inactive on microtubules, released on depolymerization, essential for antiviral interferon signaling; mutations cause midbrain-hindbrain malformation.
ARHGEF7
ARHGEF7 (β-PIX, Cool1, P85/P50) is a human chromosome 13q34 gene encoding a Dbl-family Rho guanine nucleotide exchange factor that activates Rac1 and Cdc42, regulating cytoskeleton, axon formation, endothelial exocytosis, and X-linked neurodevelopmental disease.
Arhynchobdellida
Arhynchobdellida (Blanchard, 1894) is the order of jawed, proboscisless leeches, including medicinal Hirudo and terrestrial Haemadipsidae; molecular work splits it into Hirudiniformes, Erpobdelliformes, and Americobdelliformes.
ARI (robot)
ARI is a 1.65-meter wheeled social humanoid robot developed by PAL Robotics in Barcelona, Spain, launched in 2019 and used in hospitals for elderly patient trials.
Ari Abdul
Ari Abdul (Arianna Abdul), Brooklyn-born dark alternative pop singer; viral TikTok hit "BABYDOLL" (2021-2022), EPs Fallen Angel and CCTV on RCA, debut album THE VOID due 2026.
Ari Aster
Ari Aster (born 1986, New York City) is an American writer-director of Hereditary, Midsommar, Beau Is Afraid, and Eddington, all with A24; co-founder of Square Peg with Lars Knudsen; next film Scapegoat with Scarlett Johansson.
Ari Behn
Ari Behn (Ari Mikael Bjørshol, 1972–2019), Norwegian author and visual artist best known for the 1999 story collection Trist som faen; married Princess Märtha Louise 2002–2017 and published seven books.
Ari Brown
Eric "Ari" Brown is an American Republican politician in the New York State Assembly's 20th district, elected in 2022 after two decades on Cedarhurst's village board.
Ari de Sa Neto
Ari de Sá Neto is a Brazilian entrepreneur, founder and chief executive of Arco Educação, which took the first Latin American education company to Nasdaq in 2018.
Ari Emanuel
Ari Emanuel (Ariel Zev Emanuel), American talent agent and entertainment executive; co-founded Endeavor (1995), created WME via the 2009 William Morris merger, built Endeavor into sports and live events, later founded Mari and leads TKO.
Ari Fleischer
Ari Fleischer (born 1960), American political spokesman, White House press secretary for George W. Bush from January 2001 to July 2003 during 9/11 and the Iraq War; later media consultant, author of Taking Heat, and Fox News contributor.
Ari Gibson
Ari Gibson is the name of two software and media figures: Australian animator Ari Nicholas Gibson, co-founder of Team Cherry, and a Boulder, Colorado software developer.
Ari Gold (Entourage)
Ari Gold is the fictional Hollywood superagent of HBO's Entourage (2004-2011) and its 2015 film, played by Jeremy Piven, based on real agent Ari Emanuel, winner of three consecutive supporting-actor Emmys and famous for "hug it out, bitch".