All articles starting with O
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Onasemnogene abeparvovec
Onasemnogene abeparvovec (Zolgensma, Itvisma) is an AAV9 gene therapy delivering the SMN1 gene for spinal muscular atrophy; FDA-approved 2019 intravenously under age 2 and 2025 intrathecally for age 2 and older.
Onatah Corona
Onatah Corona is a 298-km-diameter corona, a quasi-circular volcano-tectonic feature, on Venus at 49.0°N, 5.5°E, named for the Iroquois corn spirit and approved by the IAU in 1991.
Onboarding
Onboarding, also known as organizational socialization, is the set of practices an organization uses to help new employees adjust, running from before the first day up to a year.
Oncap
ONCAP is the lower-middle-market private equity platform of Onex Corporation, based in Toronto, which makes control and minority investments in North American businesses and has raised five funds since 1999.
Once (film)
Once (2007) is an Irish independent musical film written and directed by John Carney, starring Glen Hansard and Markéta Irglová as unnamed buskers in Dublin; it won the 2008 Oscar for Best Original Song with 'Falling Slowly' and spawned a Tony-winning Broadway musical.
Once (musical)
Once is a stage musical with book by Enda Walsh and music and lyrics by Glen Hansard and Markéta Irglová, adapted from John Carney's 2007 film. It opened on Broadway in 2012, won eight Tony Awards including Best Musical, and features the Oscar-winning song Falling Slowly.
Once (Nightwish album)
Once is the fifth studio album by Finnish symphonic metal band Nightwish, released June 7, 2004; its last with Tarja Turunen, it reached number 1 in Germany, Finland, Norway, and Greece.
Once a Thief (纵横四海)
Once a Thief (纵横四海) is a 1991 Hong Kong heist action-comedy directed by John Woo, starring Chow Yun-fat, Leslie Cheung, and Cherie Chung as art thieves betrayed by their boss.
Once Again (한번 다녀왔습니다) (South Korean TV series)
Once Again (한 번 다녀왔습니다) is a 2020 KBS2 Korean weekend family drama, 100 episodes by writer Yang Hee-seung and director Lee Jae-sang, about the Song family's divorces, peaking at 37% Nielsen ratings.
Once and Again
Once and Again is an American ABC family drama (1999–2002) by Marshall Herskovitz and Edward Zwick, starring Sela Ward and Billy Campbell as divorced parents who fall in love; critically acclaimed (Metascore 92) but canceled after three seasons and seven time-slot moves.
Once Bitten (1985 film)
Once Bitten is a 1985 American vampire comedy directed by Howard Storm, starring Lauren Hutton, Jim Carrey (his first major film role), Karen Kopins, and Cleavon Little; released November 15, 1985 by The Samuel Goldwyn Company, grossing $10 million domestically.
Once Human (band)
Once Human: Los Angeles melodic death/groove metal band formed in 2014 by ex-Machine Head guitarist Logan Mader and vocalist Lauren Hart; three earMUSIC albums, split up in 2022 before Hart joined Arch Enemy.
Once Human (video game)
Once Human (七日世界) is a free-to-play New Weird post-apocalyptic open-world survival game by Starry Studio and NetEase Games, launched on PC July 9, 2024, mobile April 2025, and PS5/Xbox August 25, 2026, with seasonal scenarios and Stardust-themed Deviant monsters.
Once in a Lifetime (Talking Heads song)
Once in a Lifetime (Talking Heads song), lead single of Remain in Light (1980), is an Afrobeat-influenced art-rock song made with Brian Eno from studio jams and radio-evangelist lyrics, with a famous Toni Basil-directed video.
Once More 'Round the Sun
Once More 'Round the Sun is Mastodon's sixth studio album, released June 24, 2014 on Reprise, produced by Nick Raskulinecz; it debuted at No. 6 on the Billboard 200, continued The Hunter's accessible hard-rock direction, and earned the band's third Grammy nomination.
Once More (2026 film)
Once More (ஒன்ஸ் மோர்) is a 2026 Tamil romantic drama directed by debutant Vignesh Srikanth, starring Arjun Das, Aditi Shankar, and Sona Olickal; produced by Million Dollar Studios, music by Hesham Abdul Wahab, released August 28, 2026.
Once More, with Feeling (Buffy the Vampire Slayer)
"Once More, with Feeling" is the musical episode of Buffy the Vampire Slayer (season 6, episode 7), written, directed, and scored by Joss Whedon, aired on UPN November 6, 2001; the demon Sweet forces Sunnydale residents to sing secrets, advancing Buffy's heaven revelation and Spike's love confession.
Once on This Island
Once on This Island is a 1990 one-act musical by Lynn Ahrens and Stephen Flaherty, adapted from Rosa Guy's novel My Love, My Love, retelling The Little Mermaid in the French Antilles; it ran 469 Broadway performances and won the 2018 Tony for Best Revival.
Once Upon a Forest
Once Upon a Forest is a 1993 Hanna-Barbera animated film, also known by its working titles The Endangered and Beyond the Yellow Dragons, in which three furlings seek herbs to cure a badger after a toxic gas spill; released by Fox June 18, 1993.
Once Upon a Katamari
Once Upon a Katamari (ワンス・アポン・ア・塊魂) is a 2025 puzzle action game by RENGAME and Bandai Namco, the first new Katamari Damacy entry in 14 years, released October 23-24, 2025 for Switch, PS5, Xbox Series X|S, and Steam, with time-travel levels, cousin customization, and KatamariBall multiplayer.
Once Upon a Mattress
Once Upon a Mattress: 1959 musical comedy by Mary Rodgers, Marshall Barer, Jay Thompson, and Dean Fuller, adapting The Princess and the Pea; Carol Burnett's star-making Winnifred role, later revived on Broadway in 1996 and 2024 with Sutton Foster.
Once Upon a Small Town (어쩌다 전원일기)
Once Upon a Small Town (어쩌다 전원일기) is a 2022 KakaoTV romantic comedy series directed by Kwon Seok-jang, adapted from Park Ha-min's web novel, starring Red Velvet's Joy and Choo Young-woo as a village officer and Seoul veterinarian in 12 episodes, also streamed on Netflix.
Once Upon a Studio
Once Upon a Studio is a 2023 Walt Disney Animation Studios centennial short film by Dan Abraham and Trent Correy in which 543 Disney characters gather for a group photo, mixing hand-drawn, CG, and live-action animation; it won a Children's & Family Emmy and inspired a Hollywood Studios theater.
Once upon a time
"Once upon a time" is a stock phrase used to open fairy tales and folk tales, signaling an unspecified past time. Recorded in Chaucer, it is English in origin.
Once Upon a Time (TV series)
Once Upon a Time is ABC's fantasy drama (2011-2018) by Lost writers Adam Horowitz and Edward Kitsis: 156 episodes, 7 seasons, about fairy-tale characters cursed in Storybrooke, Maine; now on Disney+.
Once Upon a Time in America
Once Upon a Time in America (C'era una volta in America) is Sergio Leone's 1984 epic gangster film starring Robert De Niro and James Woods, based on Harry Grey's The Hoods, famous for its 139-minute US cut versus the 229- and 251-minute versions.
Once Upon a Time in China (黄飞鸿)
Once Upon a Time in China (黃飛鴻) is Tsui Hark's 1991 Hong Kong martial arts film starring Jet Li as folk hero Wong Fei-hung in late Qing Canton; it won four Hong Kong Film Awards, grossed over HK$29 million, and launched a six-film series (1991–1997).
Once Upon a Time in China II (黄飞鸿之二：男儿当自强)
Once Upon a Time in China II (黄飞鸿之二：男儿当自强) is Tsui Hark's 1992 Hong Kong martial arts sequel starring Jet Li as Wong Fei-hung, with Donnie Yen as Commander Lan, Yuen Wo-ping choreography, and a 1993 Hong Kong Film Award for Best Action Design.
Once Upon a Time in China III (黄飞鸿之三：狮王争霸)
Once Upon a Time in China III (黃飛鴻之三：獅王爭霸) is a 1993 Hong Kong martial-arts film directed by Tsui Hark, with Jet Li as Wong Fei-hung.
Once Upon a Time in China IV (黄飞鸿之四：王者之风)
Once Upon a Time in China IV (黄飞鸿之四：王者之风, Wong je ji fung) is a 1993 Hong Kong kung fu film directed by Yuen Bun, with Vincent Zhao replacing Jet Li as Wong Fei-hung against the Eight Nation Alliance and the Red Lantern Sect.