All articles starting with O

Oirats

Oirats (Oyirad), western Mongolic peoples of Mongolia, Xinjiang, Qinghai, and Kalmykia; Dörbön Oyirat confederation, Dzungar Khanate, 1640 code, 1771 Torghut return, todo bichig Clear Script.

The Oireachtas is Ireland's national parliament, comprising the President, Dáil Éireann (174 TDs) and Seanad Éireann (60 senators). It holds the Constitution's sole and exclusive lawmaking power and sits at Leinster House, Dublin.

Oise

Oise, department 60 in Hauts-de-France, France; created 27 June 1790 from Île-de-France and Picardie lands, named for the Oise river, prefecture Beauvais, 5,860 km², 679 communes, about 829,900 inhabitants.

Oise-Aisne American Cemetery Plot E

Plot E at Oise-Aisne American Cemetery, Seringes-et-Nesles, France, is the hidden burial ground, established 1949, for 94-96 American servicemen executed for murder, rape, or desertion in WWII Europe.

Sep 24, 2026

Ōishi Yoshio

Ōishi Yoshio (大石内蔵助), 1659 to 1703, was chief retainer of the Akō domain and leader of the forty-seven rōnin who avenged their lord Asano Naganori by killing Kira Yoshinaka in 1703.

Oisseau-Le-Petit

Oisseau-Le-Petit, a Sarthe commune in France, preserves a restored Gallo-Roman fanum at Les Busses, a small Roman agglomeration with baths, theatre, and villa, and an 1865 hoard of 110 Iron Age gold coins.

Ōita

Ōita (大分市, Ōita-shi) is the capital of Ōita Prefecture, Kyushu, Japan, on Beppu Bay. Former Ōtomo clan stronghold and Japan's first Western-culture city; 468,996 residents (2026), 502.39 km², core city since 1997.

Oita LNG Terminal

The Oita LNG Terminal (大分LNG基地) is a liquefied natural gas import terminal at the Port of Oita in Oita Prefecture, Kyushu, Japan, operating since 1990.

Oita Marine Palace Aquarium "Umitamago"

Oita Marine Palace Aquarium "Umitamago" (大分マリーンパレス水族館「うみたまご」) is a public aquarium in Oita City, Japan, opened April 1, 2004 on Beppu Bay, known for its 1,250-ton Bungo Channel tank, walrus and dolphin shows, and the Asobeach interactive area.

Oita Petrochemical Complex

The Oita Petrochemical Complex (大分石油化学コンビナート) is a petrochemical manufacturing complex in Oita City, Japan, with Kyushu's only ethylene plant, operated by Crasus Chemical since 1969.

Oita Prefecture

Oita Prefecture (大分県, Oita-ken), a prefecture in northeastern Kyushu, Japan, capital Oita City. Known as the "Onsen Prefecture" for Beppu and Yufuin hot springs; population about 1.08 million, declining; record 5.36 million overnight guests in 2025.

Oithona

Oithona (オイトナ属) is a genus of small ambush-feeding cyclopoid copepods (Oithonidae, Baird 1843), ubiquitous from estuaries to polar seas, feeding on motile prey sensed hydrodynamically, with low metabolic rates and about 44 described species.

OJ 287

OJ 287 is a blazar, a jet-pointed active galactic nucleus at redshift 0.306, and a leading binary black hole candidate whose optical outbursts recur about every 12 years.

Oja Kodar

Oja Kodar, born Olga Palinkaš (b. 1941, Zagreb), Croatian actress, screenwriter, director, and sculptor; Orson Welles's partner and collaborator (F for Fake, The Other Side of the Wind) and heir to his unfinished films.

Ojađeno zvono

Ojađeno zvono ("The Sorrowful Bell") is a poetry collection by Tin Ujević, written while he lived in Sarajevo from 1930 to 1937. Published in 1933, it belongs to his mature phase.

Ojai, California

Ojai, CA, is a small city of about 7,400 people in Ventura County, California, in a valley beside Los Padres National Forest, known as a tourism destination.

Ojamajo Doremi (おジャ魔女どれみ)

Ojamajo Doremi (おジャ魔女どれみ), Toei Animation's magical girl franchise about witch apprentices Doremi, Hazuki, and Aiko training at MAHO-do; four TV series 1999–2002, 201 episodes, films, manga, and 2026 Nyon shorts.

Ojapali

Ojapali (ওজাপালি) is a traditional narrative performance art of Assam, India, in which the lead singer, the oja, narrates mythological stories in verse, supported by singing-dancing palis.

Ojārs Vācietis

Ojārs Vācietis (1933–1983) was a Latvian poet, translator, and publicist who led the Soviet-era Thaw generation and was banned from publishing from 1960 to 1966.

Sep 27, 2026

Ojetta R. Thompson

Ojetta Rogeriee Thompson, born 1951, is an American jurist serving as a senior judge on the First Circuit Court of Appeals, appointed by President Obama and confirmed in 2010.

Ojibwe

The Ojibwe, self-named Anishinaabeg and also called Chippewa, are an Algonquian-speaking Indigenous people of the Great Lakes, closely related to the Odawa and Potawatomi, with about 200,000 people in the United States and Canada.

Ojibwe language

Ojibwe (Anishinaabemowin, also Chippewa) is a Central Algonquian language of the Great Lakes, a dialect chain from Quebec to Montana, endangered in the US with under 1,000 Minnesota first-language speakers but active revitalization.

Ojibwe religion

Ojibwe religion, also known as Anishinaabe or Chippewa religion, is the living spiritual tradition of the Ojibwe people of the Great Lakes, centered on Giche Manidoo, the Midewiwin, and the Seven Grandfather Teachings.

Sep 24, 2026

Ojigi

Ojigi (Òjígì) was Alaafin, or king, of Oyo, a Yoruba state in what is now Nigeria, in the mid-eighteenth century, whose reign brought Oyo's greatest territorial expansion.

Ojinaga-El Encino Gas Pipeline

The Ojinaga-El Encino Gas Pipeline (Gasoducto Ojinaga-El Encino) is a 42-inch natural gas pipeline carrying gas from Ojinaga on the Texas border to El Encino, Chihuahua, Mexico.

Sep 27, 2026

Ojing Tasing

Ojing Tasing is an Indian politician from Arunachal Pradesh, a BJP minister in Chief Minister Pema Khandu's cabinet who represents the 35 Pangin constituency and holds the Rural Development, Cooperation, and Transport portfolios.

Ojiya chijimi

Ojiya chijimi (小千谷縮) is a lightweight ramie crepe fabric made in Ojiya, Niigata Prefecture, Japan, whose wrinkled texture keeps it from clinging in humid weather.

Ojo de Agua, México

Ojo de Agua (Tecámac), also called Fraccionamiento Ojo de Agua, is the largest locality of Tecámac municipality, State of Mexico, in Greater Mexico City; 386,290 residents (2020 census), about 2,250 m elevation, grown from the 1585 Hacienda Ojo de Agua and urbanized from 1968.

Ōjō Yōshū

Ōjō Yōshū (往生要集, "Essentials of Rebirth") is a Japanese Buddhist text compiled in 985 by the Tendai monk Genshin, and the formative text of Japanese Pure Land Buddhism.