All articles starting with H
20,046 articles
Herpetic gingivostomatitis
Herpetic gingivostomatitis (primary herpetic gingivostomatitis, PHGS) is the main symptomatic form of primary HSV-1 infection, causing fever and painful oral ulcers mainly in children aged 6 months to 5 years, self-limiting in 10–14 days.
Herpetic whitlow
Herpetic whitlow (whitlow finger, herpetic felon) is a painful HSV-1 or HSV-2 infection of a distal finger or thumb, occasionally a toe. Self-limited in 2-4 weeks, recurs in 30-50%, and must not be incised and drained like paronychia or felon.
Herpetiform pemphigus
Herpetiform pemphigus (pemphigus herpetiformis), named by Jablonska in 1975, is a rare pemphigus variant with itchy dermatitis herpetiformis-like grouped vesicles but pemphigus IgG autoantibodies to desmogleins or desmocollins, minimal acantholysis, and good dapsone response.
Herpetology
Herpetology is the branch of zoology that studies amphibians and reptiles, the ectothermic tetrapods called cold-blooded animals; the name comes from the Greek herpetón, meaning snake or reptile.
Herre van der Zant
Herre van der Zant (born 1963) is a Dutch experimental physicist and full professor at Delft University of Technology, working on molecular electronics and nanomechanics of atomically thin materials.
Herrenknecht
Herrenknecht AG is a German family-owned company in Schwanau, Baden-Württemberg, founded by Martin Herrenknecht in 1977, that builds tunnel boring machines; it holds an estimated 19 percent share of the global TBM market.
Herrerismo
Herrerismo is a conservative and nationalist political movement of Uruguay's Blanco (National) Party, organized around Luis Alberto de Herrera (1873–1959) and the party's dominant current from 1920 to 1960.
Herrick L. Johnston
Herrick L. Johnston, born Herrick Lee Johnston (1898–1965), was an American chemist who co-discovered the heavy oxygen isotopes oxygen-17 and oxygen-18 in 1929 with William F. Giauque.
Herring
Herring (Clupea harengus, C. pallasii, C. harengus membras): small silvery schooling Clupeidae forage fish of the North Atlantic and North Pacific, historic staple of European fisheries, now managed under stock assessments; Atlantic herring overfished per 2024 assessment.
Herringbone pattern
The herringbone pattern is a zigzag arrangement of rectangular pieces, such as tiles or bricks, laid at right angles with their ends meeting the sides of the next.
Herriot Tabuteau
Herriot Tabuteau is a Haiti-born physician and healthcare investor who founded Axsome Therapeutics in January 2012, building the central nervous system drug company into a roughly $6.1 billion business.
Herron Gaston
Herron Keyon Gaston is an American politician and Democrat elected in 2022 to the Connecticut Senate from the 23rd district, covering parts of Bridgeport and Stratford.
Herschel (Martian crater)
Herschel is a 304.5-km-diameter impact crater on Mars at 14.73°S, 129.70°E, a large southern-highlands basin with concentric floor ridges and HiRISE-monitored barchanoid dune fields.
Herschel (Mimantean crater)
Herschel is the largest impact crater on Saturn's moon Mimas, a 139-kilometer basin spanning a third of the moon's diameter, named for William Herschel, who discovered Mimas in 1789.
Herschel Grynszpan
Herschel Grynszpan (1921, Hannover; fate unknown) was a Polish-Jewish refugee who shot German diplomat Ernst vom Rath in Paris on 7 November 1938, giving the Nazis the pretext for Kristallnacht; handed to Germany in 1940, he likely died in captivity.
Herschel L. Roman
Herschel Lewis Roman was an American geneticist who pioneered the use of yeast in genetics and served as founding chair of the genetics department at the University of Washington.
Herschel Rabitz
Herschel Rabitz is a chemical physicist at Princeton University, a professor of chemistry since 1971, known for inventing the learning-algorithm approach to coherent control of quantum phenomena.
Herschel Walker
Herschel Walker, Georgia Bulldogs running back and 1982 Heisman Trophy winner, played for the New Jersey Generals in the USFL and the Cowboys, Vikings, Eagles, and Giants in the NFL; the 1989 Walker trade built Dallas's 1990s dynasty.
Herschel Walker trade
Herschel Walker trade: October 12, 1989 NFL deal sending Walker from Dallas Cowboys to Minnesota Vikings for five players and draft picks; largest trade in NFL history, later seen as the worst ever, fueling Dallas's 1990s dynasty.
Herschel-Bulkley fluid
A Herschel-Bulkley fluid is a fluid that combines a yield stress with power-law viscous flow, a model introduced by Herschel and Bulkley in 1926 and applied to drilling muds, concrete, and foods.
Herschelle Gibbs
Herschelle Herman Gibbs (born 1974, Cape Town), South African opening batsman nicknamed Scooter, played 1996-2010: 6,167 Test runs at 41.95, 8,094 ODI runs, 175 in the 438 game, six sixes in an over, and a six-month match-fixing ban.
Herse
Herse (Jupiter L, S/2003 J 17) is a small retrograde irregular moon of Jupiter in the Carme group, discovered February 27, 2003 by Gladman, Kavelaars, Petit, and Allen; mean radius about 1 km, orbital period over 734 days.
Hershef (crater on Ganymede)
Hershef is a 120 km bright ray impact crater on Ganymede at 47.39°N, 269.38°W, named for an Egyptian ram-headed god and approved by the IAU in 2000; its coarse-ice spectrum reflects trailing-hemisphere sputtering.
Hershel Greene
Hershel Greene is a veterinarian-farmer in The Walking Dead comics and TV series, first appearing in The Walking Dead #10 (July 2004). Portrayed by Scott Wilson on AMC, he mentors Rick Grimes, loses a leg in "Seed," and is beheaded by the Governor in "Too Far Gone." Distinct from Hershel Rhee, his namesake grandson.
Hershel Jick
Hershel Jick was an American drug-safety researcher who founded and led the Boston Collaborative Drug Surveillance Program in Boston in 1966, known for studies linking coffee to heart attack.
Hershel W. Williams
Hershel Woodrow "Woody" Williams (1923-2022), Marine Corps chief warrant officer and Medal of Honor recipient for destroying Japanese pillboxes with a flamethrower on Iwo Jima, February 23, 1945; last living World War II Medal of Honor recipient.
Hershey (film)
Hershey (2026) is a Mark Waters biographical drama starring Finn Wittrock as Milton Hershey and Alexandra Daddario as Kitty, released by Angel Studios in US theaters November 25, 2026.
Hershey Bears
The Hershey Bears, also known as the Hershey B'ars (1932-1938), are the AHL's oldest franchise, based in Hershey, Pennsylvania, holding a league-record 13 Calder Cups and affiliated with the Washington Capitals since 2005.
Hershey–Chase experiment
Hershey–Chase experiment (1952, Cold Spring Harbor): Alfred Hershey and Martha Chase used 32P- and 35S-labeled bacteriophage T2 and a Waring blender to show phage DNA, not protein, enters bacteria, establishing DNA as genetic material.
Hershey, Pennsylvania
Hershey, Pennsylvania: unincorporated community in Derry Township, Dauphin County, founded 1903 by Milton S. Hershey around his chocolate factory; home of Hersheypark, the Milton Hershey School, and The Hershey Company headquarters.