All articles starting with H
20,046 articles
Hair fetishism
Hair fetishism, or trichophilia, is sexual arousal focused on human hair or hairstyles; a body-part fetish classified under fetishism/partialism, diagnosable as a disorder only with distress or impairment.
Hair follicle
Hair follicle: tube-like skin organ producing hair; over 5 million at birth, 1 million on the scalp. Dermal papilla signals growth, bulge holds stem cells, cycles anagen, catagen, telogen, exogen.
Hair gel
Hair gel is a water-based styling product that holds hair in place with film-forming polymers, giving a strong hold and sleek finish compared with wax or pomade.
Hair germinal matrix cell
Hair germinal matrix cell (trichocyte, CL:0002562): mitotically active epidermal cell in the hair bulb matrix surrounding the dermal papilla; proliferates during anagen and differentiates into hair shaft and inner root sheath.
Hair iron
A hair iron, also known as a curling tong, is a hand-held electric appliance that reshapes hair, most commonly as a flat iron, curling iron, or crimping iron.
Hair loss
Hair loss (alopecia): loss of scalp or body hair from heredity, autoimmunity, stress, drugs, or scarring disease. Key types are androgenetic alopecia, alopecia areata, and telogen effluvium; treatments include minoxidil, finasteride, and JAK inhibitors.
Hair of the dog
Hair of the dog, short for "hair of the dog that bit you," is an alcoholic drink taken to relieve a hangover. First recorded in Heywood's 1546 proverbs; from an ancient folk remedy of applying the biting dog's hair to a rabid-dog bite wound.
Hair removal
Hair removal is the practice of removing unwanted body hair, categorized into depilation, which removes the hair shaft, and epilation, which removes the root, including waxing, lasers, and electrolysis.
Hair transplantation
Hair transplantation: surgery moving hair follicles from a permanent donor scalp zone to bald areas, treating androgenetic alopecia. Techniques: FUT strip harvesting (1990s) and FUE punch extraction (2000s); donor dominance principle; UK cost £1,000–£30,000.
Hairan I
Hairan I, also called Septimius Hairan or Herodianus, was the eldest son and co-king of Odaenathus of Palmyra; both were assassinated in 267, opening the way for Zenobia's regency.
Haircut One Hundred
Haircut One Hundred (Haircut 100), English new wave/funk-pop band formed in Beckenham in 1980 by Nick Heyward, Les Nemes, and Graham Jones; debut Pelican West (1982) hit UK No. 2 with four top 10 singles; 2026 reunion album Boxing the Compass.
Hairdresser
Hairdresser: a personal-appearance worker who cuts, styles, colors, and chemically treats hair, related to barbers and cosmetologists; licensed in all US states, about 595,000 US jobs, $17.21 median hourly wage, with documented musculoskeletal and chemical health risks.
Hairenik
Hairenik (Armenian: Հայրենիք, "homeland") is an Armenian-language newspaper founded in 1899 and now published weekly in Boston as the organ of the Armenian Revolutionary Federation.
Hairpin
A hairpin is a pin or clip used to hold hair in place, ranging from a straight pin with a decorated head to the U-shaped bobby pin.
Hairspray (1988 film)
Hairspray is a 1988 American comedy film written and directed by John Waters, starring Ricki Lake as a teenager campaigning to integrate a Baltimore TV dance show.
Hairspray (2007 film)
Hairspray is a 2007 American musical comedy film directed and choreographed by Adam Shankman, adapted from the 2002 Broadway musical, following teenager Tracy Turnblad in 1960s Baltimore.
Hairspray (musical)
Hairspray is a 2002 Broadway musical comedy by Marc Shaiman, Scott Wittman, Mark O'Donnell, and Thomas Meehan, based on John Waters's 1988 film, about Tracy Turnblad integrating a 1962 Baltimore TV dance show; it won eight Tony Awards including Best Musical and ran 2,642 performances.
Hairspray Live!
Hairspray Live! is NBC's 2016 live televised musical special adapted from the Broadway show Hairspray, broadcast December 7, 2016 from the Universal Studios back lot with Maddie Baillio, Harvey Fierstein, Jennifer Hudson, and Ariana Grande; it drew 8.9 million viewers and won three Creative Arts Emmys.
Hairstyle
Hairstyle: the style in which hair is cut and arranged, also called coiffure or hairdo. Covers its social signaling, ancient Egyptian wig evidence, traction alopecia risks, and 2026 fashion trends.
Hairun of Ternate
Sultan Hairun, also called Raja Maluco, was sultan of Ternate in North Maluku from 1535 to 1570, expanding the sultanate before being murdered by the Portuguese in 1570.
Hairy ball theorem
The hairy ball theorem, also called the hedgehog theorem, is an algebraic topology result: a hairy ball cannot be combed flat without creating a cowlick.
Hairy Bikers
The Hairy Bikers were a British TV cooking duo, Si King and Dave Myers (1957-2024), who mixed motorbike travel, humor, and cookery from their 2004-2006 debut The Hairy Bikers' Cookbook onward; 33 books, 6 million copies, final series Go West.
Hairy cell leukemia
Hairy cell leukemia (HCL, HCL variant) is a rare indolent B-cell leukemia with hairy-appearing cells, BRAF V600E in >95% of classic cases, splenomegaly, pancytopenia, and cladribine-rituximab treatment.
Hairy cell leukemia variant
Hairy cell leukemia variant (HCLv, HCL-v), also called splenic B-cell lymphoma/leukemia with prominent nucleoli in WHO5, is a rare splenic B-cell neoplasm, BRAF V600E-negative, MAP2K1-mutated in about 50%, resistant to purine analog monotherapy, treated with cladribine plus rituximab.
Hairy frog
Hairy frog (Trichobatrachus robustus, also Astylosternus robustus), Central African Arthroleptidae frog; breeding males grow hair-like papillae and it erects claws by breaking toe bones through skin; IUCN Least Concern.
Hairy leukoplakia
Hairy leukoplakia (oral hairy leukoplakia, OHL) is an EBV-caused white patch on the lateral tongue in immunosuppressed people, mainly untreated HIV; a CDC category-B AIDS marker, not premalignant, resolving with antiretroviral therapy.
Hairy root culture
Hairy root culture is a plant biotechnology method in which Agrobacterium rhizogenes transfers Ri plasmid DNA into plant tissue, producing fast-growing, hormone-independent, genetically stable roots.
Haisco oral complement inhibitor (sipcopan succinate)
HSK39297 (琥珀酸思普可泮片, 优可盼; NXP100) is Haisco's once-daily oral complement factor B inhibitor, approved in China in July 2026 for complement inhibitor-naive PNH adults, with IgAN phase 3 and Nuvectis ex-China licensing.
Haisla oral literature
Haisla oral literature is the oral stories, teachings, and histories of the Haisla people of Kitimat, British Columbia, centered on the nu'yem, their codified laws and narratives.
Haitham bin Tariq
Haitham bin Tariq (هيثم بن طارق), born 1954, is Sultan of Oman since 11 January 2020, succeeding his cousin Qaboos; Al Bu Said dynasty ruler known for Oman Vision 2040 fiscal reform, crown-prince succession law, and Iran-US mediation.