All articles starting with O

Oscillatoria

Oscillatoria (Vaucher ex Gomont 1892) is a genus of filamentous cyanobacteria in the order Oscillatoriales, type species O. princeps, found in freshwater and hot springs, forming motile oscillating mats without heterocysts, and repeatedly revised by molecular taxonomy.

Oscillatory shear rheometry

Oscillatory shear rheometry is a measurement technique that applies sinusoidally varying shear deformation and analyzes the stress response to determine viscoelastic properties, the standard method for polymer melts, gels, and soft solids.

Oscillococcinum

Oscillococcinum (Anas barbariae 200CK) is Boiron's homeopathic flu remedy made from diluted wild duck heart and liver; Cochrane finds low-quality evidence with no proven preventive effect.

Oscillopsia

Oscillopsia is the illusion that the visual world moves when it is still, caused by nystagmus, saccadic intrusions, or vestibulo-ocular reflex failure, most often in bilateral vestibulopathy, Ménière's disease, or neurological disease.

Oscilloscope

An oscilloscope, often called an o-scope, is an electronic test instrument that displays how a voltage varies over time, drawing the waveform as a graph.

OSCP

The OSCP (OffSec Certified Professional) is a hands-on penetration-testing certification from OffSec, earned by hacking live machines in a proctored practical exam and documenting the attacks in a report.

Osculating orbit

An osculating orbit is the Keplerian ellipse or hyperbola a body would follow at a given instant if perturbing forces stopped, sharing the body's actual position and velocity.

Oct 22, 2026

Ose Shango

Ose Shango (Yoruba: oṣé Ṣàngó) is a carved wooden Yoruba dance wand topped with a double axe motif, the primary emblem of devotees of Shango, the thunder deity.

Osea Kolinisau

Osea Kolinisau (born 1985, Suva) is a Fijian rugby sevens coach and former captain who led Fiji to Rio 2016 Olympic gold, holds the World Series record 62 caps, and now coaches the Fiji men's 7s.

Oseberg

Oseberg is a Norwegian North Sea oil and gas field around 130 km northwest of Bergen, discovered in 1979, producing since 1988, and operated by Equinor.

Oseberg Oil and Gas Field

Oseberg is a producing oil and gas field in the northern Norwegian North Sea, discovered in 1979 and producing since 1988, operated by Equinor from the Oseberg Field Centre.

Oseberg Ship burial

The Oseberg ship burial is a Viking Age grave mound near Tønsberg, Norway, where a decorated oak ship built around 820 served as the burial place of two women in 834.

Osedax

Osedax, commonly called zombie worms or boneworms, is a genus of deep-sea polychaete worms that bore into whale skeletons and digest the fat and protein inside with bacterial help.

Osees discography

The Osees discography covers the recorded output of the American rock band led by John Dwyer, formerly Thee Oh Sees, which has released thirty studio albums since 2003.

Sep 24, 2026

Osei Bonsu

Osei Bonsu, born Osei Tutu Kwame, was Asantehene (king) of the Asante Empire on the Gold Coast from 1800 to 1824, known for wars against the Fante.

Osei Kofi Tutu I

Osei Kofi Tutu I (c. 1660–1712/1717), first Asantehene and founder of the Asante empire in Ghana; with priest Okomfo Anokye and the Golden Stool he united the Asante states and defeated Denkyira at Feyiase in 1701.

Oct 22, 2026

Osei Kwadwo

Osei Kwadwo, also Osei Kojo, was the fourth Asantehene, ruler of the Asante Empire in what is now Ghana from 1764 to 1777, credited with shifting state office from hereditary birth to appointment by ability.

Oct 22, 2026

Osei Kwame

Osei Kwame (circa 1764–1803) was Asantehene, king of the Asante Empire in what is now Ghana, from 1777 to 1798, when he was destooled after conflict with the queen mother Kwaadu Yaadom.

Sep 24, 2026

Osei Yaw Akoto

Osei Yaw Akoto was Asantehene, ruler of the Asante Empire on the Gold Coast, from 1824 to 1833, succeeding his brother Osei Bonsu during war with Britain.

Oseltamivir

Oseltamivir (Tamiflu) is an oral neuraminidase inhibitor antiviral against influenza A and B, developed by Roche, licensed 1999, used for treatment and prophylaxis, with H275Y as its key resistance marker.

Osemitamab

Osemitamab (TST001) is Transcenta's humanized, fucose-reduced anti-Claudin18.2 IgG1 monoclonal antibody for CLDN18.2-expressing solid tumors, in phase III first-line G/GEJ gastric cancer development with FDA orphan drug designation.

Osemozotan

Osemozotan (MKC-242) is a selective 5-HT1A receptor agonist developed by Mitsubishi Chemical and characterized at Osaka University, showing antianxiety and antidepressant effects in animal studies.

Oct 3, 2026

Osey Ramulamma (ఒసే రాములమ్మా)

Osey Ramulamma (ఒసేయ్ రాములమ్మ) is a 1997 Telugu action drama directed by Dasari Narayana Rao, starring Vijayashanti as a Dalit woman who becomes a Naxalite rebel; an industry hit with Nandi and Filmfare awards.

OSFP (optical transceiver)

OSFP (Octal Small Form Factor Pluggable) is a pluggable optical transceiver form factor defined by the OSFP MSA for 400 Gbps, 800 Gbps, and 1.6 Tbps Ethernet links.

OSG Corporation

OSG Corporation is a Japanese cutting tool manufacturer headquartered in Toyokawa, Aichi, founded in Tokyo in 1938 by Hideo Osawa, with a network spanning 33 countries.

OSGA trial

OSGA trial (NCT02619214), a phase 4 randomized Barcelona trial comparing 30% vs 60% inspired oxygen during one hour of sevoflurane general anesthesia, measuring malondialdehyde and other oxidative stress markers in healthy surgical patients.

Osgood–Schlatter disease

Osgood-Schlatter disease (Lannelongue disease) is a traction apophysitis of the tibial tuberosity where the patellar tendon attaches, first described in 1903, affecting about 10% of adolescent athletes and usually resolving with conservative care.

Osgoode Hall

Osgoode Hall is a historic legal complex at Queen Street West in Toronto, home to Ontario's superior courts since 1846 and the Law Society of Ontario since 1832.