All articles starting with O
9,097 articles
Oren Scherman
Oren A. Scherman is a professor of supramolecular and polymer chemistry at the University of Cambridge, known for self-healing cucurbituril-based materials and directing the Melville Laboratory for Polymer Synthesis.
Oren Uziel
Oren Uziel, American screenwriter, director, and producer born 1974, known for 22 Jump Street, The Cloverfield Paradox, Mortal Kombat (story), The Lost City, directing Shimmer Lake, and creating Spider-Noir.
Orenburg
Orenburg (Оренбург), Russian city on the Ural River and capital of Orenburg Oblast, founded 1743 as an imperial fortress; population about 551,000; hit by the record April 2024 flood after the Orsk dam breach.
Orenburg Cossack Host
The Orenburg Cossack Host (Оренбургское казачье войско) was a Cossack host of the Russian Empire, formed by government initiative in 1748 to guard the empire's southeastern frontier, and abolished in 1920.
Orenburg Expedition
The Orenburg Expedition (Оренбургская экспедиция) was a Russian state enterprise created in 1734 on Ivan Kirilov's project to build fortresses on the southeastern frontier, founding Orenburg in 1743.
Orenburg Oblast
Orenburg Oblast (Оренбургская область), a Russian federal subject in the southeast of European Russia on the Southern Urals, capital Orenburg; 124,000 km², 1.82 million people, 1,876 km Kazakhstan border, major gas, oil, and grain producer.
Orenburg-Novopskov Gas Pipeline
The Orenburg-Novopskov Gas Pipeline is a 1,230 km gas pipeline built in the 1970s, running from Orenburg, Russia through Kazakhstan to Novopskov, Ukraine, owned by Gazprom and QazaqGaz.
Örendibi
Örendibi is an archaeological ruin site near Sömek village, Silifke, Mersin Province, Turkey: a Roman to early Byzantine farm settlement with a three-nave church, olive-oil works, and a lintel bearing semeion, thunderbolt, and shield reliefs.
Orenstein & Koppel
Orenstein & Koppel (O&K) was a German engineering company founded in Berlin in 1876 that became one of Germany's largest locomotive builders and later made excavators.
Oreo
Oreo: chocolate sandwich cookie brand created by Nabisco in 1912, now owned by Mondelēz International and sold in over 100 countries as the world's top-selling cookie. Outlasted predecessor Hydrox (1908); famous for Double Stuf, twist-lick-dunk marketing, and global localized flavors.
Oreochromis mossambicus
Oreochromis mossambicus, the Mozambique tilapia (Mozambique mouthbrooder), is a southern African cichlid fish described by Peters in 1852; a hardy, euryhaline maternal mouthbrooder farmed widely in Southern Africa and listed among the IUCN's 100 worst invasive species.
Oreochromis niloticus
Oreochromis niloticus, the Nile tilapia, an African cichlid farmed in over 100 countries; Africa produced 1,287,053 mt in 2019, but cage escapes threaten native Oreochromis species.
Oreochromis spp
Oreochromis (blue tilapias) is a genus of about three dozen African maternal-mouthbrooding cichlids erected by Günther in 1889; it includes Nile tilapia (O. niloticus), a leading farmed fish, and several Critically Endangered species.
Ōrero
'Ōrero is the Tahitian term for formal oratory, an ancestral literary expression bound by demanding literary and linguistic requirements, with whaikōrero of the Māori as its closest cognate.
Ores (utility)
ORES (Opérateur de Réseaux d'Energies) is a Belgian utility that manages electricity, natural gas, and public lighting networks across about 75 percent of Wallonia's municipalities, serving roughly 1.5 million customers.
Oreshnik (missile)
The Oreshnik (Russian for "hazel tree") is a Russian road-mobile, solid-fueled intermediate-range ballistic missile with MIRV capability, first fired in combat against Ukraine in November 2024.
Oreshura
Oreshura (俺の彼女と幼なじみが修羅場すぎる) is a GA Bunko light novel series by Yuji Yuji and Ruroo, 2011–2022, over 2 million copies, with a 2013 twelve-episode anime and a GanGan Joker manga.
Oresme (lunar crater)
Oresme is an IAU-adopted 82.05-km impact crater on the Moon's far side at 42.61° S, 169.22° E, carved about four billion years ago during the heavy bombardment and imaged by ESA's SMART-1.
Orest Kiprensky
Orest Kiprensky (Орест Кипренский, 1782–1836) was a Russian painter and draftsman, regarded as the first artist of Russian Romanticism and the leading master of the Russian romantic portrait.
Oreste Acuto
Oreste Acuto is an immunologist known for work on T-cell receptor signaling and CD28 co-stimulation, who was professor at Oxford's Dunn School of Pathology from 2006 and has retired.
Oreste Moricca
Oreste Moricca (1891-1984), Italian fencer and general; won sabre team gold and épée team bronze at Paris 1924, later a judge at Berlin 1936 and Guardia di Finanza commander.
Oreste Piccioni
Oreste Piccioni (1915–2002) was an Italian experimental particle physicist, the last of Enrico Fermi's students, who co-discovered the antineutron in 1956 and long disputed his exclusion from the 1955 antiproton discovery.
Oreste Puliti
Oreste Puliti (1891–1958), Italian fencer from Livorno, four-time Olympic team gold medalist in foil and sabre (1920, 1924, 1928), world foil champion 1927 and 1929, central figure of the 1924 Paris disqualification and subsequent duel with judge György Kovács.
Oresteia (Ὀρέστεια)
Oresteia (Ὀρέστεια): Aeschylus's three-play trilogy, Agamemnon, Libation Bearers, Eumenides, staged at the City Dionysia in 458 BCE, winning first prize; the only complete Greek tragic trilogy surviving, ending in the founding of the Areopagus.
Orestes (ρέστης)
Orestes (Ὀρέστης), Greek mythological hero, son of Agamemnon and Clytemnestra, who avenged his father by killing his mother and Aegisthus, then faced madness, the Erinyes, and trial at Athens in Aeschylus' Oresteia and later tragedy.
Orestes Brownson
Orestes Augustus Brownson (1803–1876) was an American intellectual, minister, editor, and philosopher who moved through Unitarianism, Transcendentalism, and socialism before converting to Catholicism in 1844.
Oresuki (俺好き)
Oresuki (俺を好きなのはお前だけかよ) is a harem rom-com light novel by Rakuda with art by Buriki, Dengeki Bunko, 17 volumes 2016-2022, 22nd Dengeki Novel Prize Gold Award; adapted into a Shonen Jump+ manga (6 volumes) and a 12-episode 2019 CONNECT anime plus a 2020 OVA.
Orexigenic neuropeptide QRFP/P518
QRFP/P518, also called 26RFa or 43RFa, is a hypothalamic RFamide neuropeptide discovered in 2003, ligand of GPR103/QRFPR, that stimulates food intake, locomotor activity, LH and insulin secretion in vertebrates.
Orexin
Orexin (hypocretin): hypothalamic neuropeptide pair orexin-A/B that stabilizes wakefulness and suppresses REM; its loss causes narcolepsy type 1, and its receptors are drug targets for insomnia antagonists and 2026-approved narcolepsy agonists like oveporexton.
Orexin/Hypocretin receptor type 1
Orexin/hypocretin receptor type 1 (OX1R, HCRTR1) is a GPCR on chromosome 1 activated by orexin-A, linked to reward, craving, feeding, and stress; dual antagonists treat insomnia, selective OX1R blockers target addiction.