All articles starting with H
20,046 articles
Haedong goseung jeon
Haedong goseung jeon (해동고승전) is a collection of biographies of Korean eminent monks compiled by the Hwaeom monk Gakhun on royal command around 1215; only part survives.
Haegen-Wasserwald
Haegen-Wasserwald: Gallo-Roman rural settlement and ancient quarry site in the forest of Haegen, Bas-Rhin, Alsace, France; excavated by François Pétry from 1971; Monument historique since 2015.
Haeinsa
Haeinsa (해인사) is a Buddhist monastery on Mount Gaya in Hapcheon County, South Gyeongsang Province, founded in 802, one of Korea's three great temples and home to the Tripitaka Koreana.
Haeinsa Temple Janggyeong Panjeon, the Depositories for the Tripitaka Koreana Woodblocks
Janggyeong Panjeon (해인사 장경판전) at Haeinsa Temple, Mount Gayasan, South Korea: four 15th-century wooden depositories housing the 81,258-block Tripitaka Koreana, UNESCO World Heritage Site since 1995, preserved by natural ventilation.
Haeju
Haeju (해주, 海州) is the capital of South Hwanghae Province, North Korea, a Yellow Sea port city about 100 km south of Pyongyang; it is the west coast's only ice-free port, second largest behind Nampho, with chemical industry and a 10,000 kW solar farm opened 2026.
Haeju Zoo
Haeju Zoo is the zoo of Haeju, capital of South Hwanghae Province, North Korea, near Haeju Botanical Garden and Mount Namsan; it held 5-6 Asiatic black bears in captive breeding and is the city's only listed zoo.
Hael Husaini
Hael Husaini, born Hal Husaini Razmi, is a Malaysian Malay pop singer-songwriter known for "Jampi" and "Haram" and for winning Anugerah Juara Lagu twice in a row.
Haemagogus
Haemagogus (shoulder mosquito), a Neotropical mosquito genus of tribe Aedini with two subgenera and about 28 species, whose arboreal, day-biting species such as Hg. janthinomys and Hg. leucocelaenus are the primary sylvatic vectors of yellow fever and Mayaro viruses in the Americas.
Haemaphysalis
Haemaphysalis (Koch, 1844) is a genus of hard ticks in Ixodidae, the second largest tick genus with about 166-176 species on all continents except Antarctica; includes the invasive Asian longhorned tick H. longicornis.
Haematemesis
Haematemesis is vomiting of blood, fresh or coffee-ground, signaling upper gastrointestinal bleeding from the esophagus, stomach, or duodenum. Key facts: peptic ulcers cause 43.6% of cases; Glasgow Blatchford score 1 or less identifies outpatient-manageable patients.
Haematobia irritans
Haematobia irritans, the horn fly (mouche des cornes), is a small blood-feeding muscid fly that lives permanently on cattle, feeding 24–38 times daily; larvae develop in dung, and the species causes about US$1 billion in annual North American cattle losses.
Haematococcus pluvialis
Haematococcus pluvialis is a freshwater unicellular green microalga that accumulates astaxanthin in thick-walled resting cells under stress, making it the primary natural source for supplements.
Haematococcus pluvialis astaxanthin extract
Haematococcus pluvialis astaxanthin extract: oleoresin from the green microalga H. pluvialis, the richest natural astaxanthin source (up to 5.5% dry weight); FDA GRAS (GRN 294, 580), EU novel food limit 8 mg/day.
Haematocolpos
Haematocolpos, also spelled hematocolpos, is the accumulation of menstrual blood in the vagina caused by an obstruction, most often an imperforate hymen, and typically appears at puberty.
Haematologica
Haematologica: monthly open-access hematology journal founded 1920 in Naples by Ferrata and Moreschi, oldest hematology journal, owned by the Ferrata Storti Foundation, official EHA journal, 2025 Impact Factor 8.2.
Haematoma of broad ligament
Broad ligament haematoma: blood collecting in the broad ligament of the uterus, a rare obstetric emergency (incidence about 1:500 to 1:20,000) caused by tears extending into uterine or vaginal vessels, treated conservatively or surgically.
Haematometra
Haematometra (hemometra, haemometra) is retention of blood in the uterine cavity, usually from outflow obstruction such as imperforate hymen, transverse vaginal septum, or cervical stenosis after procedures; treated by cervical dilatation and drainage.
Haematopoiesis
Haematopoiesis, also spelled hematopoiesis and known as blood formation or haemogenesis, is the process by which blood cells form from stem cells, primarily in adult bone marrow.
Haematopus
Haematopus is the genus of oystercatchers, family Haematopodidae, 12 coastal species worldwide that open bivalves with strong bills; includes extinct H. meadewaldoi and rapidly radiating Old World lineages.
Haematosalpinx
Haematosalpinx (hematosalpinx, haemosalpinx), blood accumulation in a distended fallopian tube; ICD-11 GA17.3. Most often from ectopic pregnancy; also endometriosis, PID, torsion, neoplasm. Diagnosed by ultrasound and MRI.
Haematuria
Haematuria, also spelled hematuria, is the presence of blood in the urine, classified as visible when it discolors the urine and non-visible when found only on testing.
Haemerythrin
Haemerythrin (hemerythrin, Hr): a non-heme, diiron oxygen-binding protein of marine invertebrates (sipunculids, brachiopods, priapulids, annelids) and many bacteria; binds O2 as a peroxide at a two-iron center in a four-helix-bundle homooctamer.
Haemoglobinuria
Haemoglobinuria (hemoglobinuria, hemoglobin in urine) is free hemoglobin in urine from intravascular red cell hemolysis after haptoglobin saturation; dipstick positive without red cells; causes include PNH, malaria, burns, and march hemoglobinuria.
Haemolymph juvenile hormone binding
Haemolymph juvenile hormone binding (JHBP): carrier proteins that transport lipophilic juvenile hormone through insect hemolymph from the corpora allata to target tissues and protect it from esterases; best known from Manduca sexta, Bombyx mori, and Galleria mellonella.
Haemolytic uraemic syndrome
Haemolytic uraemic syndrome (Gasser syndrome, ICD-11 3A21.2), a thrombotic microangiopathy with thrombocytopenia, hemolytic anemia, and kidney injury; usually Shiga toxin E. coli, sometimes complement-mediated aHUS.
Haemonchus contortus
Haemonchus contortus, the barber's pole worm, is a blood-feeding abomasal nematode of sheep and goats causing anemia; its resistance to all major anthelmintic drug classes makes it widely studied.
Haemoperitoneum
Haemoperitoneum (hemoperitoneum, intraperitoneal hemorrhage) is blood accumulating in the peritoneal cavity from internal bleeding. Causes are traumatic (liver, spleen), spontaneous (ectopic pregnancy, ruptured aneurysm, ovarian cyst), or iatrogenic; ICD-10 K66.1, ICD-11 DC51.2.
Haemophilia
Haemophilia, an inherited X-linked bleeding disorder from factor VIII (haemophilia A) or factor IX (haemophilia B, Christmas disease) deficiency; affects about 1 in 5,000 male births, treated with factor replacement, emicizumab, and AAV gene therapy.
Haemophilia A
Haemophilia A (classic hemophilia) is an X-linked bleeding disorder from factor VIII deficiency, affecting about 1 in 5,000 male births. Treated with factor replacement, emicizumab, efanesoctocog alfa, and the AAV5 gene therapy Roctavian.
Haemophilia B
Haemophilia B, also called Christmas disease, is an X-linked factor IX deficiency from F9 gene mutations, causing bleeding; treated with factor IX replacement, extended half-life products, and the 2022 gene therapy Hemgenix.