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Alemseged Tesfai
Alemseged Tesfai, born in 1944 in Adi Quala, Eritrea, is a playwright, novelist, and historian known for The Other War and his trilogy on Eritrean political history.
Alemtuzumab
Alemtuzumab (Campath, MabCampath, Lemtrada) is a humanized anti-CD52 monoclonal antibody, FDA-approved in 2001 for fludarabine-failed B-cell CLL, fully approved in 2007 after CAM307, withdrawn in the EU in 2012, and repurposed as Lemtrada for relapsing multiple sclerosis.
Alemtuzumab therapy
Alemtuzumab therapy is treatment with a monoclonal antibody that depletes lymphocytes, used mainly for relapsing multiple sclerosis and formerly for B-cell chronic lymphocytic leukemia, first approved in 2001.
Alen Halilović
Alen Halilović, born 1996 in Dubrovnik, is a Croatian left-footed attacking midfielder once dubbed the next Modrić; youngest-ever Croatia debutant (2013), signed by Barcelona in 2014, later at Hamburg, Milan, and Fortuna Sittard, now without a club.
Alena Kostornaia (Алёна Сергеевна Косторная)
Alena Kostornaia (Алёна Косторная), born 2003 in Moscow, is a Russian figure skater, 2020 European champion and 2019-20 Grand Prix Final winner in singles, now competing in pairs with husband Georgy Kunitsa.
Alena Rudkouskaya
Alena Rudkouskaya, also known as Yelena Grigoryevna Rudkovskaya, is a Belarusian swimmer born in 1973 who won the 100-meter breaststroke gold at the 1992 Barcelona Olympics.
Alena Saili
Alena Saili (born 1998, Porirua, New Zealand) is a Black Ferns Sevens rugby player, two-time Olympic gold medallist at Tokyo 2020 and Paris 2024, and the first Southlander with two Olympic golds.
Alena Schillerová
Alena Schillerová, born in 1964 in Brno, is a Czech lawyer and ANO politician serving as Deputy Prime Minister and Minister of Finance, presenting the government's budget proposals.
Alena Zavarzina
Alena Zavarzina (Алёна Заварзина, born 1989, Novosibirsk), Russian parallel snowboarder; 2011 world champion and Sochi 2014 Olympic bronze medalist in parallel giant slalom; three Olympics; ex-wife of Vic Wild; retired 2018.
Alencar (Mercurian crater)
Alencar is a 106-120 km impact crater on Mercury at 63.5S, 103.5W, IAU-approved in 1979 and named for Brazilian novelist Jose de Alencar (1829-1877); studied for its prominent secondary craters.
Alençon lace
Alençon lace (point d'Alençon), hand-made French needle lace from Alençon, Normandy, developed around 1650 by Marthe La Perrière; about seven hours per square centimeter, ten production stages, UNESCO-listed since 2010, distinct from machine-made Lyons and Levers Alençon.
Alendronic acid
Alendronic acid (alendronate, Fosamax) is an oral amino-bisphosphonate inhibiting farnesyl pyrophosphate synthase, used for osteoporosis, glucocorticoid-induced osteoporosis, and Paget's disease; 70 mg weekly dosing, FDA-approved 1995.
Alenia C-27J Spartan
The Alenia C-27J Spartan is a twin-engine tactical transport aircraft developed by Alenia with Lockheed Martin, pairing the G.222 airframe with the C-130J's flight deck and AE 2100 engines.
Aleniglipron
Aleniglipron (GSBR-1290) is Structure Therapeutics' oral, once-daily, non-peptide small-molecule GLP-1 receptor agonist for obesity; phase 2 ACCESS trials showed up to 16.3% placebo-adjusted weight loss at 44 weeks, with phase 3 planned for 2026.
Alenka Cuderman
Alenka Cuderman (born 1961, Kranj) is a Slovenian former handball player, left wing, who won gold with Yugoslavia at the 1984 Los Angeles Olympics, the first Slovenian woman Olympic champion, later a bank risk manager and EHF Women's Handball Coordinator.
ALENTIS Therapeutics
ALENTIS Therapeutics (Alentis) is a Swiss-French clinical-stage biotechnology company founded in 2019 and headquartered in Basel, developing anti-Claudin-1 antibody-drug conjugates for solid tumors and treatments for organ fibrosis.
Aleo Systems Inc.
Aleo Systems Inc. is the company founded in December 2019 by Howard Wu and three partners to build the Aleo Network, a zero-knowledge blockchain for private applications.
Aleph
Aleph (א, alef) is the first letter of the Hebrew alphabet, historically a glottal stop with gematria value 1, derived from a Proto-Sinaitic ox-head pictograph; its Greek descendant is alpha and its Arabic counterpart aleph.
Aleph Alpha
Aleph Alpha is a German artificial intelligence company founded in Heidelberg in 2019 by Jonas Andrulis and Samuel Weinbach, initially positioned as Germany's answer to OpenAI.
Aleph Group, Inc.
Aleph Group, Inc. is a digital advertising company founded by Argentine entrepreneur Gastón Taratuta that connects platforms like Twitter, Spotify, and TikTok with advertisers in emerging markets.
Aleph number
Aleph numbers (ℵ₀, ℵ₁, …) are Cantor's indexed infinite cardinals; ℵ₀ counts the naturals, ℵ₁ the countable ordinals, and under the axiom of choice every infinite cardinal is an aleph.
Aleppo (حلب)
Aleppo (حلب), Syria's second largest city, a trade hub since the 2nd millennium B.C.; its UNESCO-listed old city, citadel and souk were heavily damaged in the 2012–2016 battle, with reconstruction ongoing.
Aleppo clashes (2025–2026)
Aleppo clashes (2025–2026): fighting between Syria's transitional government and the Kurdish-led SDF, starting in Aleppo's Sheikh Maqsoud and Ashrafieh after the March 2025 integration deal expired, followed by a January 2026 offensive that cost the SDF about 80% of its territory and ended in ceasefires and brigade-level integration.
Aleppo Codex (כֶּתֶר אֲרָם צוֹבָא)
The Aleppo Codex (Keter Aram Tzova) is a tenth-century manuscript of the Hebrew Bible, written in Tiberias around 930 CE and considered the most accurate extant copy.
Aleppo offensive (November–December 2016)
The Aleppo offensive (November–December 2016) was the Syrian government and Russian-backed operation that recaptured rebel-held eastern Aleppo, besieged since July 2016, ending four years of opposition control in the city.
Aleppo pepper
Aleppo pepper, or Halaby pepper (pul biber), is a coarse, oily Capsicum annuum chile flake from Aleppo, Syria, about 10,000 SHU, fruity and raisin-like; production moved to Turkey after the Syrian war.
Aleppo soap
Aleppo soap (صابون الغار الحلبي), also called ghar soap, is a hard Syrian soap of olive oil and laurel berry oil, boiled in winter, family-stamped, dried 6–9 months, UNESCO-inscribed in 2024.
Aleppo temple of the Storm God inscriptions
The Aleppo temple of the Storm God inscriptions are Hieroglyphic Luwian royal inscriptions of King Taita of Palistin, carved on the Aleppo citadel in the 11th century BC.
Aleppo Treaty
The Aleppo Treaty is a Hittite state treaty, cataloged as CTH 75, issued by Mursili II for his nephew Talmi-Šarruma, king of Aleppo, in the 13th century BC.
Alerce Costero National Park
Alerce Costero National Park (Parque Nacional Alerce Costero), a Chilean national park in Los Ríos Region created in 2010 on the Cordillera Pelada, protects ancient Fitzroya cupressoides (alerce) forests, including the over-5,000-year-old Abuelo Alerce Milenario, with high endemism and 4x4-only access.