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Aortopulmonary window
Congenital aortopulmonary window (APW, aortopulmonary septal defect) is a rare defect, 0.1-0.6% of congenital heart disease, with an opening between the ascending aorta and pulmonary artery above separate semilunar valves, causing left-to-right shunt, heart failure, and requiring early patch surgical repair.
Aos Sí
Aos Sí (áes síde, "people of the mounds") are the supernatural race of Irish folklore, identified with the Tuatha Dé Danann after their defeat by the Milesians, living in fairy mounds, called the Good People, and active at Samhain.
Aoshima, Ehime
Aoshima (青島) is a 0.49 km² island of Ozu City, Ehime, Japan, in the Seto Inland Sea, famous as a cat island where feral cats outnumbered residents; about 80 cats and four people remained by 2024.
Aosong Electronics (奥松电子)
Aosong Electronics (奥松电子), or Guangzhou Aosong Electronic Co., Ltd., is a Chinese MEMS sensor manufacturer founded by Zhang Bin in Guangzhou in 2003, building an 8-inch MEMS chip fab in Chongqing.
Aosta
Aosta (Augusta Praetoria Salassorum; French Aoste) is the capital of Italy's Valle d'Aosta, a Roman colony founded 25 BC after Augustus defeated the Salassi. Its walls, Arch of Augustus, Porta Praetoria, theatre, amphitheatre, and cryptoporticus survive, earning it the nickname little Rome of the Alps.
Aosta Valley
Aosta Valley (Valle d'Aosta, Vallée d'Aoste) is Italy's smallest autonomous region, bilingual in French and Italian under its 1948 special Statute, with Francoprovençal and Walser German minorities, 122,532 residents, and an Alpine territory above 2,000 m average altitude.
Aotearoa
Aotearoa is the Māori name for New Zealand, meaning "land of the long white cloud", originally used for the North Island only. It appears on passports and currency, while the official name remains New Zealand, changeable only by law.
Aotearoa Legalise Cannabis Party
Aotearoa Legalise Cannabis Party (ALCP, The Cannabis Party): New Zealand single-issue cannabis-legalisation party founded 1996 by Michael Appleby, co-led with Maki Herbert, contesting nine general elections with no seats; best vote 1.66% in 1996.
Aotu World (凹凸世界)
Aotu World (凹凸世界, AOTU) is a Chinese original 3D web animation by studio 7DOC (七创社), first streamed in 2015-2016 across four seasons, known for its Low Poly style, Aotu Tournament premise, huge doujin fandom, mobile game, and the 2025 Reborn reboot by Guanghe Studio.
Aotus
Aotus, night monkeys or owl monkeys, a Neotropical primate genus and the only nocturnal simian primates; 11 species, Panama to Argentina, cone monochromatic, malaria research model.
Aotus trivirgatus
Aotus trivirgatus, the three-striped or northern night monkey (douroucouli), is a small nocturnal New World primate of northern South America, gray-necked group, karyotype 2n=50, IUCN Least Concern.
Aoudaghost
Aoudaghost, also written Awdaghost or Awdaghust (Berber Tagdawst), was a wealthy medieval trading city in southeast Mauritania, a major caravan terminus conquered by the Almoravids around 1050 to 1070.
Aoukâr
Aoukâr, also known as Erg Aoukar or Hodh, is an endorheic basin in southeastern Mauritania between Kiffa and Néma, once a lake region and heartland of the Ghana Empire.
Aowin
Aowin, also spelled Awowin, is an Akan people and precolonial state of southwestern Ghana and southeastern Côte d'Ivoire, the region's most powerful state before the rise of Denkyira and Asante.
Aoxomoxoa
Aoxomoxoa, the Grateful Dead's third studio album (Warner Bros.-Seven Arts, June 20, 1969), their first self-produced and 16-track record and first with all lyrics by Robert Hunter, remixed in 1971 and reissued with both mixes in 2019.
Aoyama Cemetery (青山霊園)
Aoyama Cemetery (青山霊園) is a public cemetery in Minato ward, Tokyo, opened in 1874 on the former Aoyama family estate and often described as Japan's first public cemetery.
Aozora Bank
Aozora Bank (株式会社あおぞら銀行) is a Japanese commercial bank created in 2001 from the failed Nippon Credit Bank, specializing in structured finance and syndicated lending, with Daiwa Securities Group as its largest shareholder since 2024.
AP All-Time All-America college football team
The AP All-Time All-America college football team, chosen in 2025, named the greatest college players from 1925 to 2025, headlined by Tim Tebow and Deion Sanders.
Ap and Bp star classification
Ap and Bp stars, where p stands for peculiar, are magnetic chemically peculiar main-sequence stars of late B and early A type, first found magnetized by Babcock in 1947.
Ap and Bp stars
Ap and Bp stars are magnetic chemically peculiar stars of the upper main sequence, with strong magnetic fields and unusual surface abundances of elements like silicon and europium.
AP Calculus
AP Calculus, or Advanced Placement Calculus, is the Advanced Placement program's pair of high school courses, AB and BC, that can earn students college credit or advanced placement.
AP Computer Science Principles
AP Computer Science Principles (AP CSP) is an introductory Advanced Placement computer science course from the College Board, first offered in fall 2016 with its first exam in May 2017.
AP Dhillon (ਅਮਰਿਤਪਾਲ ਸਿੰਘ ਢਿੱਲੋਂ)
AP Dhillon (Amritpal Singh Dhillon, ਅਮਰਿਤਪਾਲ ਸਿੰਘ ਢਿੱਲੋਂ), born 1993 in Gurdaspur, is a Canada-based Punjabi singer-producer; "Brown Munde" (2020) made him a global Punjabi-pop star with over 5 billion streams.
Ap Iorwerth government
The ap Iorwerth government is the Welsh Government led by First Minister Rhun ap Iorwerth, Wales's first Plaid Cymru administration, formed 12 May 2026 as a minority government after Plaid won 43 of 96 Senedd seats, ending a century of Labour dominance.
Ap Ventures
AP Ventures is a London-headquartered venture capital firm, founded in 2018 by Andrew Hinkly and Kevin Eggers, investing in the hydrogen value chain and platinum group metals.
AP-1 transcription factor
AP-1 (activator protein 1) is a dimeric transcription factor complex of Jun, Fos, ATF, and MAF bZIP proteins that binds TRE/CRE DNA sites, regulating proliferation, inflammation, memory, and cancer; no direct inhibitor is approved, though T-5224 reached phase II.
AP-3 complex subunit delta domain, metazoa
AP-3 complex subunit delta domain, metazoa (IPR010474) is the C-terminal protein domain, residues 661-807 of human AP3D1, of the delta subunit of the AP-3 vesicle trafficking adaptor complex, involved in membrane binding and Arf1 recruitment.
AP1000
The AP1000 (Advanced Passive 1000) is a 1,100 MWe Westinghouse pressurized water reactor whose passive safety systems work without pumps or power; six units operate in China and the United States.
AP2
AP2 (Andra AP-fonden, the Second National Pension Fund) is one of Sweden's national pension buffer funds, managing about SEK 475 billion for the income-based old-age pension.
AP2/ERF transcription factor family
AP2/ERF transcription factors, also called APETALA2/ethylene responsive factors, are plant-specific regulators with a conserved ~60-70 amino acid AP2 DNA-binding domain, divided into AP2, ERF, DREB, RAV, and Soloist subfamilies that control stress tolerance, hormone signaling, and development.