All articles starting with O

Onna-musha (女武者)

Onna-musha (女武者), also called onna-bugeisha (女武芸者), were female warriors of Japan's bushi (samurai) class, trained mainly with the naginata to defend home and castle; famous figures include Tomoe Gozen and Nakano Takeko.

Onnum

Onnum (Hunnum), the Roman fort at Halton Chesters, Northumberland, on Hadrian's Wall in wall mile 21; unique L-shaped plan from a Severan western extension, about 1.75-2 ha, garrisoned by a part-mounted cohort then the Ala I Pannoniorum Sabiniana.

ONNX

ONNX (Open Neural Network Exchange) is an open specification allowing machine learning models to run across different runtimes and hardware. It was announced in 2017 by Facebook, Microsoft, and AWS.

ONNX Runtime

ONNX Runtime is an open-source, cross-platform inference engine for ONNX machine learning models, developed by Microsoft and open sourced in December 2018. It runs models on servers, mobile devices, and browsers.

Sep 24, 2026

Ono no Imoko

Ono no Imoko (小野妹子) was a Japanese courtier who led the first recorded embassy to Sui China in 607, famous for the letter from the Emperor of the land where the sun rises.

Ono no Komachi (小野小町)

Ono no Komachi (小野小町), early Heian-period Japanese waka poet, the only woman among the Six Poetic Immortals, famed for love poems such as Hyakunin Isshu No. 9 and for beauty legends.

Oct 20, 2026

Onobrychis

Onobrychis (sainfoins), Fabaceae genus published by Miller in 1754, native Europe to Mongolia, Arabia, Ethiopia; about 130–208 species; includes forage legume sainfoin O. viciifolia, non-bloating, tannin-rich.

Onobrychis viciifolia

Onobrychis viciifolia (common sainfoin) is a perennial Fabaceae forage legume native to Central and SE Europe, non-bloating due to condensed tannins, drought tolerant via a deep taproot, and under study as a protein-rich perennial pulse crop.

Oct 10, 2026

Onofrio Panvinio

Onofrio Panvinio, Latinized Onuphrius Panvinius, was an Augustinian hermit, historian, and antiquarian born at Verona in 1530 who wrote on ancient Roman antiquity and the history of the papacy.

Onogurs

The Onogurs, a tribal federation of the Pontic-Caspian steppe between the 5th and 7th centuries, gave Europe its name for the Hungarians, from On-Oğur, meaning "ten Oğurs (tribes)".

Onokoro Catenae

Onokoro Catenae is a 240 km chain of craters on Saturn's moon Rhea, approved by the International Astronomical Union in 2010 and named for an island of Japanese myth.

Sep 19, 2026

Onomasticon of Amenemope

The Onomasticon of Amenemope is an ancient Egyptian onomasticon, a categorized list of 610 words compiled at the end of the Twentieth Dynasty, no earlier than Ramesses IX.

Sep 19, 2026

Onomasticon of Amenope

The Onomasticon of Amenope, also called the Onomasticon of Amenemipet, is an ancient Egyptian word-list papyrus compiled between the late 20th and 22nd Dynasties, classifying 610 entries.

Onomatopoeia

Onomatopoeia: words formed by imitating the sounds they name (moo, bang, cuckoo). Term coined in English by Henry Peacham (1577); Greek onoma + poiein; core case of sound symbolism and iconicity.

Onome Scott-Emuakpor

Onome Scott-Emuakpor is an American aerospace engineer at Wright-Patterson Air Force Base known for an energy-based fatigue-life prediction method for turbine engine materials and a 2013 PECASE award.

Onon

Onon (Онон гол, 鄂嫩河, historic 斡難河) is a 1,032 km river rising in Mongolia's Khentii mountains, joining the Ingoda to form the Shilka of the Amur basin; birthplace region of Genghis Khan.

Onon Balj Biosphere Reserve

Onon Balj Biosphere Reserve, a UNESCO MAB site in Khentii and Dornod provinces, Mongolia, designated 14 June 2023 around Onon-Balj National Park at the forest-steppe transition of the Onon and Balj River basin near Chinggis Khan sites.

Onondaga Council Fire

The Onondaga Council Fire is the central council fire of the Haudenosaunee Confederacy, kept by the Onondaga Nation near Syracuse, New York, where the Grand Council meets.

Oct 20, 2026

Onondaga County

Onondaga County, New York: county established 1794 with seat at Syracuse; 476,516 residents (2020), 466,584 (2025 estimate); home rule charter, county executive government, Onondaga Nation territory within its borders.

Onondaga Lake

Onondaga Lake, near Syracuse, New York, is a 4.6-square-mile lake, once among America's most polluted, a Superfund site since 1994, sacred to the Onondaga Nation, now recovering after Honeywell's 2014 dredging.

Oct 20, 2026

Ononis

Ononis (restharrow), Fabaceae genus of about 88 annual/perennial herbs and shrubs, Mediterranean-centered, monadelphous stamens, dimorphic anthers, used in medicine and as forage.

Oct 10, 2026

Onora O'Neill

Onora O'Neill, Baroness O'Neill of Bengarve, is a British Kantian philosopher, Principal of Newnham College, Cambridge from 1992 to 2006 and a crossbench member of the House of Lords.

Onore del vero

Onore del vero is a 1957 poetry collection by the Italian poet Mario Luzi, widely read as his first step out of Hermeticism toward everyday reality.

ONOS

ONOS (Open Network Operating System) is an open-source software-defined networking controller platform released by ON.Lab in December 2014, designed for carrier-grade networks and managing switches through a distributed controller cluster.

Sep 19, 2026

Onos Ariyo

Onos Ariyo, born Onoriode Ebiere Ariyo, is a Nigerian gospel singer from Delta State known for "Alagbara" and as the first gospel artist signed to Sony Music West Africa in 2024.

Onradivir tablets

Onradivir tablets (昂拉地韦片, Anruiwei, ZSP1273) is a Chinese class 1 antiviral approved May 2025 for uncomplicated influenza A in adults; the first approved PB2 RNA polymerase inhibitor, dosed 0.6 g daily for 5 days.

OnRobot

OnRobot is a Danish manufacturer of end-of-arm tooling, the grippers, sensors, and tools mounted on a robot arm's wrist, formed in 2018 and based in Odense, Denmark.

Onryō (怨霊)

Onryō (怨霊) are vengeful spirits of the unjustly dead or living grudge-holders in Japanese belief, central to goryō appeasement cults from the 863 Shinsen'en rite onward, and known through Michizane, Masakado, Sutoku, noh, kabuki, and J-horror films.

Ons Erfdeel

Ons Erfdeel ("Our Heritage") is a Flemish-Dutch cultural magazine founded in 1957 by Jozef Deleu, renamed de lage landen in 2020, with an independent foundation established in 1970.