All articles starting with H
20,046 articles
Haliotis midae
Haliotis midae, perlemoen, is South Africa's endemic and only commercially fished and farmed abalone; an IUCN Endangered species whose legal fishery collapsed under organised poaching but persists alongside a major aquaculture industry.
Haliotis rubra
Haliotis rubra, blacklip abalone (Leach, 1814), an Australian endemic vetigastropod abalone of rocky reefs from NSW to Rottnest Island; up to 21 cm, diet mainly red algae, basis of Australian abalone fisheries, IUCN Vulnerable.
Haliplidae
Haliplidae, crawling water beetles, a family of about 240 small aquatic adephagan beetles worldwide, defined by enlarged hind coxal plates used as air stores, herbivorous larvae, and poor swimming.
Halisarna
Halisarna (Ἁλίσαρνα), small ancient settlement in the border region of Mysia and the Troad in western Anatolia, attested c. 750 BC–AD 300, cited by Pliny (Nat. Hist. 5.126); distinct from Halasarna on Kos.
Halit Ergenç
Halit Ergenç (Halit Ahmet Ergenç), Turkish actor born 1970 in Istanbul; trained at Mimar Sinan in opera and musical theatre. Known as Onur in Binbir Gece, Sultan Süleyman in Muhteşem Yüzyıl, and Cevdet in Vatanım Sensin; Golden Butterfly Best Actor 2014.
Halite
Halite, commonly known as rock salt, is the water-soluble mineral form of sodium chloride that forms evaporite beds in saline lakes and marine basins, rising at depth into salt domes.
Halk hikâyesi
Halk hikâyesi, Turkish for "folk story," is an anonymous narrative genre of Turkish folk literature told aloud in mixed verse and prose by minstrels called âşıks from the 16th century onward.
Halkbank
Halkbank (Türkiye Halk Bankası A.Ş.) is a Turkish state-controlled commercial bank founded in 1938, now majority-owned by the Turkey Wealth Fund and the country's leading lender to small and medium-sized enterprises.
Halkevleri
Halkevleri (Turkish for "People's Houses") were community cultural and educational centers in Turkey, established by the Republican People's Party in 1932 and closed in 1951.
Hall & Oates
Hall & Oates, formally Daryl Hall & John Oates, is an American pop-soul duo formed 1970 in Philadelphia. Six US number one singles, six platinum albums, RIAA's most successful rock duo (1984), Rock Hall 2014; split by 2023–2025 litigation.
Hall County, Georgia, United States
Hall County, Georgia: county in northeast Georgia founded December 15, 1818, named for Lyman Hall; seat Gainesville, Lake Lanier, poultry industry, population 226,568 (2025).
Hall effect
The Hall effect, or Hall's Law, is a transverse voltage that appears across a current-carrying conductor when a magnetic field is applied perpendicular to the current, discovered in 1879.
Hall effect current sensor
A Hall effect current sensor measures electric current by sensing the magnetic field it produces, using a Hall element, and can measure both DC and AC with galvanic isolation.
Hall effect sensor
A Hall effect sensor, or Hall sensor, is a transducer that converts a magnetic field into an electrical signal via the Hall effect, discovered by Edwin Hall in 1879.
Hall Islands
Hall Islands (Pafeng) are low-lying coral atolls in the Outer Islands of Chuuk, Federated States of Micronesia; principal atolls Nomwin, Murilo, East Fayu, Ruo; 1,092 people (2010), Pááfang language, distinct from Arctic Hall Island namesakes.
Hall of Annals of Thutmose III
The Hall of Annals of Thutmose III is a set of chambers at Karnak whose walls record his Asiatic campaigns, the main source on his wars.
Hall of Fame (song)
Hall of Fame (song): 2012 pop single by The Script featuring will.i.am, leadoff from album #3 on Epic/Phonogenic; first UK number 1 for the band, 49 weeks on the UK chart, peak #25 on the Billboard Hot 100, RIAA Double Platinum.
Hall of Mirrors
The Hall of Mirrors (Galerie des Glaces) is the principal gallery of the Palace of Versailles, a 73-meter hall built between 1678 and 1684 with 357 mirrors.
Hall of Worthies
The Hall of Worthies (집현전, Jiphyeonjeon) was the royal research institute of early Joseon Korea, founded by King Sejong in 1420 and known for its role in creating Hangul.
Hall Pass
Hall Pass is a 2011 American comedy film directed by the Farrelly brothers, in which Owen Wilson and Jason Sudeikis play married men granted a week of freedom.
Hall technique
The Hall technique is a minimally invasive pediatric dentistry method that seals a preformed metal crown over a decayed baby molar without drilling or anesthesia.
Hall Wines of Napa, L.P.
Hall Wines of Napa, L.P. is a Delaware limited partnership serving as the private-offering vehicle for the Hall family's Napa Valley wine business in St. Helena, California.
Hall-effect thruster
The Hall-effect thruster, or Hall thruster, is an ion thruster in which trapped electrons ionize xenon, producing thrust for spacecraft, first flown in 1971 on the Soviet Meteor-1-10 satellite.
Hall-Riggs syndrome
Hall-Riggs syndrome (ORPHA:2107, OMIM 234250) is an extremely rare autosomal recessive disorder with microcephaly, facial dysmorphism, spondylometaphyseal dysplasia, severe intellectual disability, and absent speech; eight cases in two families reported since 1975.
Hall–Héroult process
The Hall–Héroult process is the industrial electrolytic process that produces nearly all primary aluminum, invented independently by Charles Martin Hall and Paul Héroult in 1886.
Hall–Petch relationship
The Hall–Petch relationship is an empirical relation in materials science: a polycrystalline metal's yield strength increases in proportion to the inverse square root of its average grain size.
Hall's marriage theorem
Hall's marriage theorem, proved by Philip Hall in 1935, states that a bipartite graph has a matching covering one side if and only if every subset has enough neighbors.
Halla
Halla (Hallasan, 한라산) is South Korea's highest peak, a 1,919 m volcano on Jeju Island; last eruption 1007 CE, summit lavas dated 17.7–16.2 ka, now a polygenetic composite volcano.
Halla Bol
Halla Bol (हल्ला बोल) is a 2008 Hindi crime drama by Rajkumar Santoshi starring Ajay Devgn, Vidya Balan, and Pankaj Kapur, inspired by the Jessica Lal case and Safdar Hashmi's murder.
Halla Tómasdóttir
Halla Tómasdóttir is an Icelandic politician who became the 7th President of Iceland in 2024, after serving six years as CEO of The B Team.