All articles starting with O
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Outer membrane porin, bacterial
Bacterial outer membrane porins are β-barrel channel proteins in the Gram-negative outer membrane, discovered in 1976, forming water-filled trimeric pores of 16 or 18 strands that admit solutes up to ~600 Da and mediate antibiotic entry and resistance.
Outer membrane protein
Outer membrane protein (OMP): integral protein of the Gram-negative bacterial outer membrane, almost always a transmembrane β-barrel; targeted by a C-terminal β-signal, assembled by the BAM machine, and cataloged in OMPdb.
Outer membrane protein assembly factor BamA-like
BamA-like (Omp85 superfamily) outer membrane protein assembly factors: essential 16-stranded beta-barrel proteins with POTRA domains that insert beta-barrel OMPs in bacteria, mitochondria, and chloroplasts; darobactin targets BamA.
Outer Mongolia
Outer Mongolia, also Wai Menggu or Gadaad/Ar Mongol, is the former name of the independent state of Mongolia, distinguished from China's Inner Mongolia; under Qing rule from 1691, independent in 1911, Mongolian People's Republic 1924.
Outer product
The outer product of two vectors multiplies every entry of one by every entry of the other, producing an m by n matrix of rank one, written u v^T.
Outer Range
Outer Range is a Prime Video neo-Western sci-fi thriller created by Brian Watkins, starring Josh Brolin as Wyoming rancher Royal Abbott, who finds a time-void on his land; two seasons (2022-2024), cancelled July 2024.
Outer Ring Road, Hyderabad
The Nehru Outer Ring Road, or ORR, is a 158 km, eight-lane access-controlled expressway encircling Hyderabad, India, built from 2007 and fully opened in June 2016.
Outer Ring Road, Pune
The Outer Ring Road, also called the Pune Ring Road, is a circular access-controlled expressway being built around Pune, India, with construction beginning in 2025.
Outer Solar System Origins Survey
The Outer Solar System Origins Survey (OSSOS) was an optical survey of the trans-Neptunian region, run on the Canada-France-Hawaii Telescope in Hawaii from 2013 to 2017.
Outer space
Outer space is the near-vacuum region beyond the atmospheres of celestial bodies, extending from the conventional boundary above Earth through interplanetary, interstellar, and intergalactic space.
Outer Space Treaty
The Outer Space Treaty (1967), formally the Treaty on Principles Governing Activities of States in the Exploration and Use of Outer Space, is the foundation of international space law: no WMD in orbit, no national appropriation, states responsible for private space activities.
Outer surface protein C, Borreliaceae
Outer surface protein C (OspC) is a 22-kDa lipoprotein of Lyme disease Borreliaceae, encoded on cp26, expressed during tick feeding and early mammalian infection, required for infection, structurally a helical homodimer, and highly diverse with 22 sequence types.
Outer Wilds
Outer Wilds is a 2019 open-world mystery game by Mobius Digital and Annapurna Interactive: a 22-minute time-loop solar system where knowledge is the only progression. Won BAFTA 2020 Best Game; expansion Echoes of the Eye (2021).
Outerplanar graph
An outerplanar graph is a graph drawable in the plane without edge crossings and with all vertices on the outer face; every outerplanar graph is planar, but K4 is not.
Outfitting
Outfitting is the phase of ship construction in which a vessel's piping, electrical wiring, joiner work, machinery, and painting are installed beyond the steel hull structure.
Outflow tract reconstruction
Outflow tract reconstruction is a family of cardiac surgeries that rebuild the pathways carrying blood out of the heart's ventricles, most often in congenital defects like tetralogy of Fallot.
Outfund
Outfund is a London-based fintech company founded in 2017 by Daniel Lipinski that provides revenue-based finance: equity-free cash advances to online businesses repaid as a share of sales.
Outgassing
Outgassing is the release of gas from a solid material in vacuum or at elevated temperature, a key gas load in vacuum systems and contamination source in spacecraft.
Outhouse
An outhouse, also called an outside toilet or privy, is a small outdoor structure built over a pit that serves as a toilet for households without piped sewerage.
Outing
Outing is the non-consensual public disclosure of a person's sexual orientation or gender identity. Known from the 1990 OutWeek Malcolm Forbes controversy, outing raises journalism-ethics, legal, school, and digital-privacy issues distinct from voluntary coming out.
Outkast
OutKast, Atlanta hip-hop duo of André 3000 and Big Boi formed in 1992, pioneers of Southern rap's Dirty South sound; eight albums, Speakerboxxx/The Love Below sold over 10 million, first hip-hop group to win the Album of the Year Grammy (2004), Rock Hall inductees 2025.
Outkast discography
OutKast discography: six studio albums (1994-2006) by the Atlanta duo André 3000 and Big Boi, from Southernplayalisticadillacmuzik to Idlewild, including Aquemini, Stankonia, and the Grammy-winning Speakerboxxx/The Love Below.
Outland (film)
Outland (1981) is a Peter Hyams science-fiction thriller starring Sean Connery as a marshal on Jupiter's moon Io, a futuristic remake of High Noon; The Ladd Company's first film, released by Warner Bros. May 22, 1981, grossing about $17-20 million domestically.
Outlander (book series)
Outlander book series by Diana Gabaldon: historical time-travel novels, first published 1991 (UK title Cross Stitch), following Claire Randall and Jamie Fraser across 1743 Scotland and colonial America, nine published novels, tenth announced, Starz adaptation.
Outlander (film)
Outlander is a 2008 science-fiction action film directed by Howard McCain, in which a space traveler crash-lands in Viking-era Norway and joins local warriors to hunt an alien predator.
Outlander (novel)
Outlander (1991), Diana Gabaldon's first novel, also titled Cross Stitch in the UK, follows WWII nurse Claire Randall time-traveling to 18th-century Scotland and outlaw Jamie Fraser; genre-hybrid bestseller that launched a nine-book series and the Starz adaptation.
Outlander (TV series)
Outlander is a Starz television series (premiered August 9, 2014) adapted from Diana Gabaldon's novels, developed by Ronald D. Moore, starring Caitríona Balfe and Sam Heughan as time-traveling couple Claire and Jamie Fraser; eight seasons, 101 episodes, prequel Blood of My Blood.
Outlander: Blood of My Blood
Outlander: Blood of My Blood is a Starz prequel series (premiered August 8, 2025) to Outlander, created by Matthew B. Roberts, telling the love stories of Jamie Fraser's parents Brian Fraser and Ellen MacKenzie and Claire's parents Henry Beauchamp and Julia Moriston, with no source novels; season 2 returned September 18, 2026.
Outlandos d'Amour
Outlandos d'Amour is the 1978 debut studio album by English rock band The Police, released by A&M Records and featuring the hit singles "Roxanne" and "So Lonely".
Outlast
Outlast (2013) is a first-person survival horror game by Montreal's Red Barrels; a journalist with a camcorder explores Mount Massive Asylum with no combat, night-vision batteries, and the Whistleblower DLC.