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ATB102, aryl hydrocarbon receptor (AhR) agonist for ulcerative colitis
ATB102 (YUQ-A1007) is Allianthera's oral, gut-enriched aryl hydrocarbon receptor agonist in phase 1 trials for refractory moderate-to-severe ulcerative colitis; Dr. Falk Pharma licensed worldwide rights in July 2025, excluding Greater China.
ATC clearance
An ATC clearance is an authorization issued by air traffic control for an aircraft to proceed under specified conditions, typically on an instrument flight plan in controlled airspace.
ATCC herbarium
ATCC herbarium: Index Herbariorum entry (code ATCC) for the American Type Culture Collection, founded 1925, Manassas, Virginia; 92,000 specimens of living microorganisms, plant tissue cultures, and seeds.
Atchafalaya Basin Floodway System
The Atchafalaya Basin Floodway System is a system of levees and floodways in south-central Louisiana that carries a share of Mississippi River floodwater to the Gulf.
Atchison, Topeka and Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway, often called the Santa Fe, was an American Class I railroad chartered in Kansas in 1859 that served the Southwest.
Atchisson AA-12
The Atchisson AA-12, originally the Atchisson Assault Shotgun and later rebuilt as the Auto Assault-12, is an American selective-fire 12-gauge combat shotgun known for low recoil and drum-fed firepower that was never adopted by any military.
ATCO
ATCO Ltd. is a Calgary, Alberta-based energy, utilities, and structures company founded by the Southern family in 1947, which controls Canadian Utilities Limited and its regulated utilities.
ATCO Records
ATCO Records: American label founded 1955 by Herb Abramson as an Atlantic Records division (Atlantic Corporation), home to the Coasters, Cream, AC/DC, Genesis, Yes; merged into EastWest 1991, relaunched by Atlantic 2020.
ATCvet Classification System
The ATCvet Classification System is a hierarchical coding scheme giving each veterinary medicine a code, maintained by the WHO Collaborating Centre in Oslo and updated annually.
Ate (EP)
Ate (에이트) is the ninth mini album by K-pop group Stray Kids, released July 19, 2024 via JYP; eight tracks led by "Chk Chk Boom," it sold over 3 million copies in Korea and ranked No. 5 on IFPI's 2024 Global Album Sales Chart.
Atea Pharmaceuticals
Atea Pharmaceuticals is a Boston-based biopharmaceutical company, founded in 2012 by Jean-Pierre Sommadossi and listed on Nasdaq as AVIR, that develops oral antivirals for hepatitis C and E.
Ateas
Ateas, also spelled Atheas, was a fourth-century BCE king of the Scythians of the northwestern Black Sea region, known for his shifting alliance with Philip II of Macedon.
Ateba Gautier
Ateba Gautier, 'The Storm' (formerly 'The Silent Assassin'), Cameroonian UFC middleweight born 2002 in Yaounde, based at Manchester Top Team; DWCS 2024 graduate with three first-round UFC KOs, decision over Pulyaev, TKO of Diaz, and 2026 KO loss to Kopylov.
Atebetü'l-Hakayık
Atebetü'l-Hakayık ("the threshold of truths") is a 12th-century didactic poem on ethics and religious advice, written in Karakhanid Turkish by Edib Ahmed Yüknekî.
Ateev Mehrotra
Ateev Mehrotra is an American physician and health care policy researcher who studies how telemedicine, retail clinics, and price transparency change US health care quality and cost.
Ateez (에이티즈)
ATEEZ (에이티즈) is an eight-member South Korean boy group formed by KQ Entertainment, which debuted in 2018 and became the first K-pop boy group to perform at Coachella in 2024.
Ategua
Ategua, archaeological site near Córdoba, Spain, occupied from the Late Bronze Age to the 15th century. The Roman city, a Municipium Flavium, surrendered to Julius Caesar on 19 February 45 BC before the Battle of Munda.
Atelectasis
Atelectasis, or partial lung collapse, is reversible loss of lung volume from airway obstruction, compression, hypoventilation, or surfactant impairment; common after anesthesia, diagnosed by chest x-ray or CT, treated with lung expansion and cause-directed care.
Atelerix
Atelerix (African hedgehogs), genus Atelerix Pomel 1848 of spiny hedgehogs, family Erinaceidae, native to Africa; four species including the four-toed A. albiventris and North African A. algirus; sister genus to Erinaceus, 48 chromosomes.
Ateles belzebuth
Ateles belzebuth, the white-bellied or long-haired spider monkey (É. Geoffroy, 1806), is an Endangered atelid primate of Amazonian and montane forests in Brazil, Colombia, Ecuador, Peru, and Venezuela, with fission-fusion groups of about 20 and highly suspensory locomotion.
Ateles geoffroyi
Ateles geoffroyi, Geoffroy's or Central American spider monkey (mono araña), a frugivorous Atelidae primate from Mexico to Colombia; IUCN Endangered, six recognized subspecies, revised by 2015 mtDNA phylogeny.
Atelier
Atelier: French word for an artist's workshop or studio, also the small-group studio school where a master painter trains dedicated students, historically alongside guilds and academies.
Atelier (video game series)
Atelier (アトリエ) is Gust's alchemy-themed JRPG series since 1997, beginning with Atelier Marie; over 25 mainline games, 8 million+ units sold, known for synthesis crafting, time limits, and sub-series like Arland, Dusk, and Ryza.
Atelier Ryza: Ever Darkness & the Secret Hideout (ライザのアトリエ ～常闇の女王と秘密の隠れ家～)
Atelier Ryza: Ever Darkness & the Secret Hideout (ライザのアトリエ) is Gust's 2019 alchemy RPG for PS4, Switch, and Steam, launching the Secret trilogy starring Reisalin Stout, with real-time hybrid combat and a node-based synthesis system.
Atelier Yumia: The Alchemist of Memories & the Envisioned Land
Atelier Yumia: The Alchemist of Memories & the Envisioned Land (2025) is a Gust/Koei Tecmo open-world JRPG starring Yumia Liessfeldt, the first Atelier on Xbox, and the series' fastest selling entry.
Atellan farce
Atellan farce (Latin fabula Atellana) was a native Italian masked, largely improvised comic farce performed at Rome from the third century BC, with stock characters like Maccus and Pappus; only fragments survive.
Atelopus
Atelopus (harlequin toads, stubfoot toads) is a Neotropical bufonid frog genus from Costa Rica to Bolivia, with over 100 species, most threatened by chytridiomycosis.
Atelosteogenesis type I
Boomerang dysplasia (OMIM 112310), a perinatal-lethal FLNB-related skeletal dysplasia with short-limbed dwarfism, joint dislocations, and boomerang-shaped long bones, now subsumed under atelosteogenesis type 1.
Atelosteogenesis type II
Atelosteogenesis type II (AO2, De la Chapelle dysplasia) is a lethal perinatal skeletal dysplasia from SLC26A2 (DTDST) mutations, autosomal recessive, with limb shortening, cleft palate, hitchhiker thumbs, and respiratory failure at birth.
Atelosteogenesis type III
Atelosteogenesis type III (AO3, AOIII) is a rare autosomal dominant skeletal dysplasia from FLNB gain-of-function mutations, with joint dislocations, short limbs, airway malacia, and fewer than 25 reported cases.