All articles starting with O

Ormen Lange

Ormen Lange is a gas field in the southern Norwegian Sea, discovered in 1997 and producing since 2007; it is Norway's second-largest gas field, developed entirely with subsea equipment.

Oct 20, 2026

Ormoc, an independent component city on western Leyte, Philippines; chartered 1947 (RA 179), 238,545 people (2024), 85 barangays, Queen Pineapple and Piña Festival, site of the deadly 1991 Tropical Storm Uring flash flood.

Ormolu

Ormolu (French or moulu, ground gold), also called gilt bronze or bronze doré, is mercury fire-gilded bronze or brass used for 18th- and 19th-century French furniture mounts, clocks, and candelabra; the toxic process was banned in France in 1830.

Oct 22, 2026

Ormon Khan

Ormon Khan (Ormon Niyazbek uulu, c. 1791–1854) was a Kyrgyz chief of the Sarybagysh tribe who united the northern Kyrgyz tribes and ruled as khan from 1842.

Sep 21, 2026

Ormond A. MacDougald

Ormond A. MacDougald is a physiologist studying adipose tissue biology at the University of Michigan, where he holds the John A. Faulkner Collegiate Chair of Physiology.

Ormond Beach power station

Ormond Beach power station is a two-unit natural gas-fired power plant on the coast of Oxnard, California, with both units online since 1971 and a combined capacity of 1,491 MW.

Ormond Beach, Florida

Ormond Beach is a Volusia County, Florida city just north of Daytona Beach, incorporated April 22, 1880 as Ormond. Known for the 1888 Ormond Hotel, Rockefeller's Casements, and beach auto racing.

Ormonde Wind Farm

Ormonde Wind Farm is a 150 MW offshore wind farm in the Irish Sea about 10 km off Barrow-in-Furness, England, with 30 five-megawatt turbines fully operational since February 2012.

Ormulum

The Ormulum (Orrmulum), a 12th-century Early Middle English verse homily cycle on the Gospels by the Augustinian canon Orm, surviving in his autograph Bodleian MS Junius 1 with its own phonetic spelling system.

Ormund Hightower

Ormund Hightower is the Lord of Oldtown and head of House Hightower in Fire & Blood and House of the Dragon, green commander of the Reach host, uncle-nephew of Otto Hightower, who fell at Tumbleton in 130 AC; the show plays him with James Norton.

Ormutivimab

Ormutivimab (奥木替韦单抗, Xunke) is a recombinant human anti-rabies monoclonal antibody by North China Pharmaceutical, NMPA-approved January 2022 for rabies post-exposure prophylaxis, dosed 20 IU/kg.

Orna Cohen-Fix

Orna Cohen-Fix is a cell biologist who leads the Laboratory of Biochemistry & Genetics at NIH's NIDDK, studying nuclear shape, size, and cell-cycle regulation, and received a 2000 PECASE award.

Orna Guralnik

Orna Guralnik (born 1964) is an Israeli-American clinical psychologist and psychoanalyst in New York, NYU PostDoc faculty member, and star of Showtime's documentary series Couples Therapy since 2019.

Orna Therapeutics

Orna Therapeutics is a Watertown, Massachusetts biotechnology company that engineers circular RNA molecules so the body produces cell therapies in vivo; Eli Lilly agreed in 2026 to acquire it for up to $2.4 billion.

Ornament (music)

Musical ornament: decorative short notes or symbols (trill, mordent, appoggiatura, turn, grace note) added to embellish a melody, prominent in late Renaissance, Baroque, and Classical eras and central to historically informed performance.

Ornamental alliums

Ornamental alliums are bulbous members of the genus Allium, grown in gardens for their spherical flower heads in late spring and early summer, with about 250 ornamental species and 240 cultivars in the trade.

Ornamental plant

Ornamental plant: a plant grown for decoration rather than food or raw materials, spanning cut flowers, houseplants, bedding plants, and trees and shrubs; a roughly 27 billion USD (2021) industry led by the Netherlands and dominated by roses, chrysanthemums, carnations, gerberas, tulips, and lilies.

Oct 22, 2026

Ornamental prose

Ornamental prose (орнаментальная проза) is a style in Russian literature in which poetic devices like rhythmical repetition and leitmotifs replace causal plot; it flourished in the modernist 1910s and 1920s.

Ornatenton Formation

Ornatenton Formation: Middle Jurassic (late Bathonian to Early Oxfordian) shallow-marine mudstone and siltstone unit of the North German Dogger Group and South German Jura, source of Wiehenvenator.

Ornella Muti

Ornella Muti, stage name of Francesca Romana Rivelli, is an Italian actress born in Rome in 1955, discovered by Damiano Damiani for La moglie più bella, known for Ferreri films, Flash Gordon, and three Nastri d'argento.

Ornette Coleman

Ornette Coleman (1930–2015), Fort Worth-born alto saxophonist and composer, father of free jazz; creator of harmolodics; Atlantic albums, Prime Time, 2007 Pulitzer for Sound Grammar.

Ornidazole

Ornidazole (Tiberal, Kolpicid) is a third-generation 5-nitroimidazole antiprotozoal and antibacterial drug with a 14-15 hour half-life, used for trichomoniasis, giardiasis, amoebiasis, bacterial vaginosis, and anaerobic infections.

Ornithine

Ornithine is a non-proteinogenic amino acid that serves as the central intermediate of the urea cycle, which the liver uses to convert toxic ammonia into urea.

Ornithine aminotransferase

Ornithine aminotransferase (OAT, EC 2.6.1.13), a PLP-dependent mitochondrial matrix enzyme transferring ornithine's δ-amino group to α-ketoglutarate; deficiency causes gyrate atrophy, and the enzyme is a cancer drug target.

Ornithine decarboxylase

Ornithine decarboxylase (ODC, EC 4.1.1.17) is a PLP-dependent enzyme that decarboxylates L-ornithine to putrescine, the rate-limiting first step of polyamine biosynthesis; its inhibitor DFMO treats sleeping sickness.

Ornithine transcarbamylase

Ornithine transcarbamylase (OTC, EC 2.1.3.3), also ornithine carbamoyltransferase, is a mitochondrial matrix enzyme of the urea cycle converting carbamoyl phosphate and ornithine to citrulline; X-linked OTC deficiency causes the most common urea cycle disorder.

Ornithine transcarbamylase deficiency

Ornithine transcarbamylase deficiency (OTC deficiency) is an inherited X-linked metabolic disorder that impairs the urea cycle, letting ammonia reach neurotoxic levels; it is the most common urea cycle disorder.

Ornithine translocase deficiency

Ornithine translocase deficiency, also called HHH syndrome or ORNT1 deficiency, is a rare autosomal recessive urea cycle disorder caused by SLC25A15 mutations, causing hyperornithinemia, hyperammonemia, and homocitrullinuria.