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Atsimo-Atsinanana
Atsimo-Atsinanana, a region of southeastern Madagascar with capital Farafangana, five districts, and 18,373 km2; one of the country's poorest regions at 83 percent poverty, hit by Cyclone Freddy in 2023.
Atsinanana Region
Atsinanana is a region of eastern Madagascar on the Indian Ocean, capital Toamasina (Tamatave), the country's main port. 22,382 km², seven districts, 91 communes; lychee, clove, and cane exports; HDI 0.494 (2022).
Atsiz
Atsiz (اتسز), fully Ala al-Din wa'l-Dawla Abu'l-Muzaffar Atsiz ibn Muhammad, was Khwarazmshah from 1127 or 1128 until 1156 or 1157, remembered as the real founder of the Khwarazmshah dynasty.
Atsiz's rebellion against Sanjar
Atsiz's rebellion against Sanjar (عصيان أتسيز على سنجار) was the Khwarazmshah Atsiz's attempt to throw off the overlordship of his Seljuk suzerain, Sultan Sanjar, fought mainly in Khwarazm and Khorasan between 1138 and 1147.
Atsugi
Atsugi (Atsugi-shi) is a city in central Kanagawa Prefecture, Japan, on the Sagami River about 40 kilometers from Tokyo. It had 223,825 residents in 2024.
Atsuhiro Osuka
Atsuhiro Osuka (大須賀篤弘) is a Japanese organic chemist known for linking porphyrins into long arrays and Möbius aromaticity, a Kyoto University professor from 1996 to 2020.
Atsuhiro Sato
Atsuhiro Sato (佐藤アツヒロ), born 1973 in Kanagawa Prefecture, is a Japanese singer and stage performer best known as the youngest member of the roller-skate idol group Hikaru GENJI.
Atsuji Miyahara
Atsuji Miyahara (宮原厚次), born 1958 in Osumi, Kagoshima, is a Japanese Greco-Roman wrestler, Self-Defense Forces club member, 1984 Olympic flyweight gold medalist, 1988 silver medalist, and 1986 Asian Games champion.
Atsuko Okatsuka
Atsuko Okatsuka (岡塚敦子), born 1988, is a Taiwan-born, Japan-raised American stand-up comedian in Los Angeles. Known for the HBO special The Intruder (2022), the Hulu special Father (2025), and the viral Drop Challenge with her grandmother.
Atsuko Yatani
Atsuko Yatani, publishing as A. Yatani, is a physiologist at Baylor College of Medicine whose 1987 Science paper showed that G proteins directly activate ion channels in the heart.
Atsumi Tanezaki (種﨑敦美)
Atsumi Tanezaki (種﨑敦美), born 1990 in Oita Prefecture, is a Japanese voice actress with Haikyo known for Anya Forger in SPY×FAMILY, Frieren, Dai in Dragon Quest: The Adventure of Dai, and Chise in The Ancient Magus' Bride; first to win both lead and supporting Seiyu Awards in one year.
Atsumori
Atsumori is a Noh play by Zeami Motokiyo, composed before 1423, in which the priest Rensei meets the ghost of Taira no Atsumori, whom he killed at Ichi-no-tani.
Atsuo Yamada
Atsuo Yamada (Yamada Atsuo) is a Japanese electrochemist and professor at the University of Tokyo known for lithium-ion battery research, including early LFP cathodes and nonflammable electrolytes.
Atsushi Kumanogoh
Atsushi Kumanogoh (熊ノ郷 淳), born 1966, is a Japanese immunologist known for discovering immune semaphorins and serving as the 19th president of The University of Osaka since 2025.
Atsushi Miyajima
Atsushi Miyajima (宮島 篤) is a Japanese cell biologist who cloned the IL-3 and GM-CSF receptor subunits and studies liver development, regeneration, and iPS cell-derived liver tissue.
Atsushi Miyawaki
Atsushi Miyawaki (宮脇敦史) is a Japanese bioimaging researcher at RIKEN who develops fluorescent proteins and biosensors, created cameleon and Fucci, and received the 2021 Japan Academy Prize.
Atsushi Nakajima (中島 敦) (Bungo Stray Dogs)
Atsushi Nakajima (中島敦) is the protagonist of Bungo Stray Dogs by Kafka Asagiri and Sango Harukawa, voiced by Yuto Uemura. An orphaned tiger-transformer with the ability 月下獣, he joins the Armed Detective Agency and is named for the real author of Sangetsuki.
Atsushi Ohtsu
Atsushi Ohtsu is a Japanese medical oncologist specializing in gastrointestinal cancers, known for the 2015 RECOURSE trial of TAS-102 and gastric cancer trials RAINBOW and AVAGAST.
Atsushi Sakurai
Atsushi Sakurai (櫻井敦司) was a Japanese singer, the vocalist and lyricist of the rock band Buck-Tick, fronting the band from its 1987 debut until his death in 2023.
Atsushi W. Tashima
Atsushi W. Tashima, born 1934, is a senior judge on the United States Court of Appeals for the Ninth Circuit, appointed by President Bill Clinton in 1996.
Atsuto Suzuki
Atsuto Suzuki (鈴木厚人, born 1946) is a Japanese experimental particle physicist who conceived and led the KamLAND reactor antineutrino experiment, detecting neutrino oscillation and geoneutrinos.
Atsyrkhus Mons
Atsyrkhus Mons is a 170-km-diameter mountain (mons) on Venus at 78.5°S, 227°E, in quadrangle V-62. IAU-approved in 1997; named for the Ossetian daughter of sun god Khur. Distinct from Atira Mons.
Atta Troll
Atta Troll is a satirical verse epic by Heinrich Heine about a dancing bear whose escape becomes a vehicle for political and literary satire, begun in 1841.
Atta-hamiti-Inshushinak
Atta-hamiti-Inshushinak (Atta-ḫamiti-Inšušinak) was a late Neo-Elamite king of Anzan and Susa, son of Hutran-tepti, attested by inscriptions and a stela from Susa now in the Louvre.
Attabeira Corona
Attabeira Corona is a 240-km-diameter corona on Venus at 1.5°S, 211.5°E, in quadrangle V-39; IAU-named in 2003 for the Taíno fertility goddess of Puerto Rico.
Attaché
Attaché: lowest ordinary diplomatic rank at an embassy, held by specialized officers such as military, naval, air, commercial, science, and legal attachés; military attachés, formalized after the Napoleonic period with Radetzky's 1810 reporting guidelines, observe foreign armed forces under Vienna Convention accreditation rules.
Attachie
Attachie is a condensate-rich natural gas field in the Montney formation of northeast British Columbia, operated by ARC Resources, whose Phase I plant began producing in 2024.
Attachment and Entry (reactome R-HSA-9678110)
Attachment and Entry (R-HSA-9678110) is a Reactome pathway for SARS-CoV-1 attachment to human cells: spike S1 binds ACE2, S2 mediates fusion, cathepsin L or TMPRSS2 cleavage activates entry, ending in genome uncoating.
Attachment and Entry (reactome R-HSA-9694614)
Attachment and Entry (R-HSA-9694614) is a Reactome pathway for SARS-CoV-2 entry into human cells: spike-ACE2 binding, proteolytic activation by cathepsin L, TMPRSS2, or furin, fusion or endocytosis, and nucleocapsid release.
Attachment disorder
Attachment disorder covers two childhood diagnoses, reactive attachment disorder (RAD) and disinhibited social engagement disorder (DSED), arising from severe early neglect; DSM-5 split them, and coercive attachment therapy is discredited.