All articles starting with O
9,097 articles
Ottava rima
Ottava rima is a stanza form of eight 11-syllable lines rhymed ABABABCC, originating in medieval Italy as the standard meter of Italian epic and narrative poetry.
Ottavio Arancio
Ottavio Arancio is an Italian-born American physician-scientist and cellular neurobiologist, professor at Columbia University's Taub Institute, known for pioneering study of synaptic dysfunction in Alzheimer's disease.
Ottavio Cogliati
Ottavio Cogliati (1939-2008), Italian road cyclist and 1960 Rome Olympic gold medalist in the 100 km team time trial with Bailetti, Fornoni, and Trapè; later a winless professional rider.
Ottavio Piccolomini
Ottavio Piccolomini (1599–1656) was an Italian soldier who served the Habsburgs as a general in the Thirty Years' War and helped bring about Wallenstein's fall.
Ottawa
Ottawa, Canada's capital in eastern Ontario, grew from Bytown, founded with the Rideau Canal in 1826, and was chosen as capital by Queen Victoria in 1857. It hosts the federal government, over 1,900 tech firms, and ranked first in North America in Numbeo's 2026 quality of life index.
Ottawa ankle rules
Ottawa ankle rules: 1992 Stiell clinical decision rule deciding when ankle or mid-foot x-rays can be withheld after acute injury; malleolar and midfoot tenderness plus four-step weight-bearing criteria; sensitivity near 99%, low specificity.
Ottawa Black Bears
Ottawa Black Bears, formerly the New York Riptide, were an NLL box lacrosse franchise at Canadian Tire Centre for the 2024-25 and 2025-26 seasons, led by Jeff Teat, and discontinued operations in September 2026.
Ottawa Citizen
Ottawa Citizen, English-language daily broadsheet in Ottawa, Ontario, owned by Postmedia Network. Founded in the 1840s as the Bytown Packet by William Harris, renamed Ottawa Citizen in 1851; daily since 1865.
Ottawa County, Michigan, United States
Ottawa County, Michigan, a Lake Michigan county with county seat Grand Haven, organized 1837, named for the Ottawa tribe; population 308,459 (2025 estimate), one of Michigan's fastest-growing counties.
Ottawa Hospital
The Ottawa Hospital (L'Hôpital d'Ottawa), a publicly funded teaching hospital in Ottawa, Ontario, formed in 1998 from the Riverside, Civic, and General hospitals; three main campuses, roots in Élisabeth Bruyère's 1845 General Hospital, and a new Dow's Lake campus under development.
Ottawa Macdonald–Cartier International Airport
Ottawa Macdonald–Cartier International Airport (IATA: YOW), also known as Ottawa International Airport, is the main airport serving Ottawa, Ontario, named for Fathers of Confederation Sir John A. Macdonald and Sir George-Étienne Cartier.
Ottawa Rapid FC
Ottawa Rapid FC, Ottawa's professional women's soccer club and a founding member of the Northern Super League (2025), plays at TD Place Stadium; playoff qualifier in its first two seasons.
Ottawa Redblacks
Ottawa Redblacks (Rouge et Noir d'Ottawa), CFL East Division team founded 2010, debuted 2014 after Rough Riders and Renegades. Won Grey Cup 2016 in overtime; lost finals 2015 and 2018; play at TD Place, Lansdowne Park.
Ottawa Senators
Ottawa Senators (Les Sénateurs d'Ottawa), NHL Eastern Conference franchise granted December 16, 1991, first season 1992-93, reviving the 1917-34 original Senators; play at Canadian Tire Centre in Kanata, planning a LeBreton Flats arena.
Ottawa South
Ottawa South (Old Ottawa South), Ottawa neighbourhood between the Rideau Canal and Rideau River; settled 1814, annexed 1907; also federal riding 35080 (pop. 126,791) and provincial district 079.
Ottawa Treaty
The Ottawa Treaty (Anti-Personnel Mine Ban Convention, APMBC) is a 1997 treaty banning anti-personnel landmines, in force 1 March 1999, with 162 parties; major non-parties include the US, Russia, and China, and several European states withdrew in 2025–2026.
Ottawa University
Ottawa University (Kansas), founded 1865 via the 1862 Ottawa Tribe treaty, is a private Baptist-affiliated university with campuses in Ottawa, Kansas and Surprise, Arizona, HLC-accredited since 1914, NAIA Braves athletics, and free tuition for Ottawa Tribe members.
Otter
Otter, any of 13-14 semiaquatic carnivorous mammals of Lutrinae (Mustelidae), including the sea otter (Enhydra lutris), giant otter (Pteronura brasiliensis), and Eurasian otter (Lutra lutra); most species are threatened, and sea otters anchor kelp forests.
Otter.ai
Otter.ai: AI meeting assistant (formerly AISense), founded 2016 by Sam Liang and Yun Fu in Mountain View; real-time transcription, speaker ID, summaries on Zoom, Teams, Google Meet; $50M Series B 2021.
OtterBox
OtterBox, an American protective case brand founded by Curt Richardson in Fort Collins, Colorado in 1998, began as a waterproof drybox maker and now sells Defender, Symmetry, Commuter, and Fre phone cases, DROP+ tested beyond MIL-STD-810G, majority owned by CCMP Growth Advisors since 2024.
Ottessa Moshfegh
Ottessa Moshfegh (born 1981, Boston), also Ottessa Charlotte Moshfegh, American novelist of Eileen, My Year of Rest and Relaxation, Death in Her Hands, and Lapvona; PEN/Hemingway winner, Booker-shortlisted, known for isolated, bodily candid narrators.
Oṭṭhaddha (Mahāli)
Oṭṭhaddha, also known as Mahāli, was a Licchavī rājā of Vesālī known as the addressee of the Mahāli Sutta (DN 6), where he asked about heavenly sights and sounds.
Ottis Anderson
Ottis Anderson, nicknamed O.J., NFL running back 1979-1992 for the St. Louis Cardinals and New York Giants; 10,273 rushing yards, 81 touchdowns, two Super Bowl titles, and Super Bowl XXV MVP.
Ottis Toole
Ottis Elwood Toole (1947–1996), Florida drifter and serial killer, partner of Henry Lee Lucas; convicted of six murders, confessed and recanted to hundreds including the 1981 Adam Walsh killing, named his killer in 2008.
Ottmar Edenhofer
Ottmar Edenhofer, German climate economist; Director and Chief Economist of PIK, TU Berlin professor, IPCC Working Group III Co-Chair 2008–2015, ESABCC chair; known for carbon pricing and carbon dioxide removal research.
Ottmar Hitzfeld
Ottmar Hitzfeld is a German retired football manager, nicknamed Der General, who won the European Cup with Borussia Dortmund in 1997 and Bayern Munich in 2001.
Ottmar Mergenthaler
Ottmar Mergenthaler (1854–1899) was a German-born machinist who invented the Linotype, a typesetting machine casting entire lines of metal type, first operated at the New York Herald Tribune in 1886.
Otto – Der Außerfriesische
Otto – Der Außerfriesische is a 1989 West German comedy starring and co-directed by Otto Waalkes, whose character travels from East Frisia to Miami to save his lighthouse.
Otto – Der Film
Otto – Der Film (1985) is Otto Waalkes' feature debut, a West German slapstick comedy co-directed with Xaver Schwarzenberger, written with the Titanic gag team, drawing about 14.5 million West and East German admissions, the most-attended German film.
Otto Arosemena Gómez
Otto Arosemena Gómez (1925–1984) was an Ecuadorian lawyer, businessman, and politician who served as president of Ecuador from 1966 to 1968, leading the return to constitutional rule.