All articles starting with O
9,097 articles
Oocyte donation
Oocyte donation is a fertility treatment in which eggs from a donor are fertilized in vitro and transferred to a recipient, pioneered at Monash in 1984.
Oocyte retrieval
Oocyte retrieval, also called oocyte aspiration, is the medical procedure of collecting mature eggs from ovarian follicles for in vitro fertilization, standard since the late 1980s as transvaginal ultrasound-guided aspiration.
Oocyte vitrification
Oocyte vitrification is a cryopreservation method that cools human eggs so rapidly they solidify into a glass-like state without ice crystals, replacing slow freezing as the standard for fertility preservation.
OODA loop
Decision cycle of observe, orient, decide, act developed by USAF Colonel John Boyd (1927-1997) from air-to-air combat tactics; a richer model than the common diagram, central to Marine maneuver warfare doctrine and adopted in business, policing, and AI research.
Oodgeroo Noonuccal
Oodgeroo Noonuccal, known until 1988 as Kath Walker, was an Aboriginal Australian poet and activist whose 1964 collection We Are Going was the first poetry book published by an Aboriginal Australian.
Oofos
Oofos is an American footwear company founded in 2011 and headquartered in Braintree, Massachusetts, that makes cushioned recovery sandals, slides, and clogs designed to reduce stress on feet and joints.
Oogenesis
Oogenesis is female gamete formation: diploid ovarian cells undergo meiosis to haploid oocytes, arrested in prophase I for decades in humans, resuming at ovulation, with polar bodies, age-related aneuploidy, and IVF relevance.
Oogonial cell
Oogonial cell (oogonium, CL:0000024): an undifferentiated female germ cell that proliferates mitotically and gives rise to oocytes during fetal life; also invoked, controversially, as adult oogonial stem cells (OSCs) whose existence in postnatal mammalian ovaries is disputed.
Ooh La La (Faces song)
Ooh La La, the 1973 Faces song written by Ronnie Lane and Ronnie Wood, closing track of their final album Ooh La La, sung by Wood after Rod Stewart rejected the key, later famous from Rushmore.
Oohalu Gusagusalade
Oohalu Gusagusalade (ఊహలు గుసగుసలాడే) is a 2014 Telugu romantic comedy, Srinivas Avasarala's directorial debut, starring Naga Shourya and Raashi Khanna, adapted from Cyrano de Bergerac and released 20 June 2014.
Ooi Eng Eong
Ooi Eng Eong, also published as Eng Eong Ooi, is a Singapore-based vaccinologist and physician-scientist at Duke-NUS Medical School known for dengue immunology and for leading Singapore's COVID-19 vaccine collaboration with Arcturus Therapeutics.
Ōoka Tadasuke
Ōoka Tadasuke (大岡忠相, 1677–1751), known as Ōoka Echizen no kami, was an Edo-period Japanese official who served as Edo's south town magistrate under shogun Tokugawa Yoshimune and led the Kyōhō reforms' municipal work.
Ōoku
The Ōoku (大奥, "Great Interior") was the women's quarters of Edo Castle, housing the Tokugawa shogun's family and the female servants who ran their household.
Oolite
Oolite is a sedimentary rock, usually limestone, composed of ooids, concentrically layered calcium carbonate grains under 2 mm that form in shallow, agitated seawater like the Bahamas.
Oolong (乌龙茶)
Oolong (乌龙茶), also called blue tea, is a partially oxidized Camellia sinensis tea made by withering, tumbling, partial oxidation, fixing, rolling, and drying. Main producers are Fujian, Guangdong, and Taiwan; oxidation spans roughly 10–80%.
Oom Gert Vertel en ander gedigte
Oom Gert Vertel en ander gedigte ("Oom Gert Tells and Other Poems") is the first poetry collection of Afrikaans writer C. Louis Leipoldt, published in Cape Town in 1911.
Oom Schalk Lourens tales
The Oom Schalk Lourens tales are short stories by South African writer Herman Charles Bosman, narrated by a wily old Boer farmer in the Groot Marico district.
Ōomi
The Ōomi (大臣) was the chief ministerial title of the Yamato court, held by Ōmi-kabane clan heads and abolished at the Taika Reform of 645.
Oommen Chandy
Oommen Chandy (ഉമ്മൻ ചാണ്ടി), Indian National Congress leader, two-term Chief Minister of Kerala (2004–06, 2011–16), Puthuppally MLA from 1970 to 2023, known for his mass contact programme and later exonerated in the solar scam sexual exploitation case.
Oompa-Loompas
Oompa-Loompas are Willy Wonka's small factory workers from Roald Dahl's 1964 Charlie and the Chocolate Factory, originally black African pygmies, revised in 1973 to white Loompaland creatures and reimagined in the 1971, 2005, and 2023 films.
Oomph!
Oomph! is a German Neue Deutsche Härte band formed in Wolfsburg in 1989, regarded as pioneers of the genre before Rammstein carried it to a worldwide audience.
Oomycete
Oomycetes, or water moulds, are fungus-like stramenopiles in the SAR supergroup, not true fungi, with two-flagellate zoospores, glucan-cellulose walls, and major plant pathogens such as Phytophthora infestans.
Oomycete disease management
Oomycete disease management is the control of plant diseases caused by oomycetes, fungus-like pathogens such as potato late blight, downy mildews, and Phytophthora root rots.
Oomycete systematics and taxonomy
Oomycete systematics and taxonomy: classification of oomycetes, fungus-like stramenopiles in the SAR supergroup, sister to Ochrophyta in Gyrista; covers saprolegnian and peronosporalean clades, ITS, cox1, and cox2 barcoding, and genome-scale phylogenies.
Oona Chaplin
Oona Castilla Chaplin (born 1986, Madrid) is a Spanish-British actress, granddaughter of Charlie Chaplin; played Talisa in Game of Thrones, Zilpha in Taboo, and Varang in Avatar: Fire and Ash (2025), distinct from her grandmother Oona O'Neill Chaplin.
Oona Laurence
Oona Laurence, American actress from New York, originated the title role of Matilda in Broadway's Matilda the Musical, earned 2013 Tony Honors, and appeared in Southpaw, Pete's Dragon, The Beguiled, Bad Moms, Big Time Adolescence, Lost Girls, and Red Ink.
Oona O'Neill
Lady Oona Chaplin, Oona O'Neill, was the fourth wife of Charlie Chaplin. This Bermuda-born figure married him in 1943 and lived in Switzerland until her death in 1991.
Ooni
Ooni, formerly Uuni, is a Scottish consumer cooking company that makes portable outdoor pizza ovens, founded in 2012 by the husband-and-wife team Kristian Tapaninaho and Darina Garland.
Ooni of Ife copper mask
The Ooni of Ife copper mask, usually called the Obalufon mask, is a life-size copper face mask from Ife, Nigeria, traditionally identified as King Obalufon II.
Oooguruk Oil and Gas Field
The Oooguruk Oil and Gas Field is an offshore Alaska North Slope field producing since 2008 from an artificial gravel island in Harrison Bay, Beaufort Sea, now operated by Hilcorp.