All articles starting with H
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Hippocampus (mythology)
Hippocampus (ἱππόκαμπος, hippocamp): Greek mythological sea-horse with a horse's forequarters and fish or sea-monster tail; chariot-beast of Poseidon and mount of the Nereids, chiefly known from ancient art rather than myths.
Hippocampus hippocampus
Hippocampus hippocampus, the short-snouted seahorse (short-snout seahorse), a Syngnathidae seahorse from the eastern Atlantic and Mediterranean; 15 cm max, male brood pouch, IUCN Data Deficient, CITES Appendix II.
Hippocras
Hippocras (hypocras, ypocras; Latin Vinum Hippocraticum) is a medieval and early modern sweetened spiced wine, named for the Hippocrates' sleeve filter, served cold as a digestive and prescribed medicinally into the late eighteenth century.
Hippocrates (Ἱπποκράτης)
Hippocrates (Ἱπποκράτης), Greek physician of Cos, c. 460–370 BC, called the Father of Medicine; name behind the Hippocratic Corpus of about 60–70 treatises and the Hippocratic Oath, though none of the works is reliably his.
Hippocratic AI
Hippocratic AI is a Palo Alto, California healthcare-AI startup co-founded by CEO Munjal Shah that builds safety-focused, patient-facing voice AI agents on its Polaris model architecture.
Hippocratic Oath (Ὅρκος)
The Hippocratic Oath (Ὅρκος; Latin Iusiurandum) is the ancient Greek physicians' oath of the Hippocratic Corpus, probably 4th century BC, sworn by Apollo and Asclepius; modern schools mostly use revised oaths.
Hippocrepis
Hippocrepis (horseshoe vetches) is a genus of 34 Fabaceae species in tribe Loteae, native Europe to Pakistan and Macaronesia to Arabia, with curved lomentaceous pods; type-era name from Linnaeus 1753.
Hippodrome
Hippodrome (Greek hippodromos, horse + course): ancient Greek and Roman oval track for horse and chariot races with tiered seating; Roman counterpart the circus; modern sense covers equestrian arenas and theaters, e.g. Hippodrome of Constantinople.
Hippodrome at Ptolemais/Barkes Limen
Hippodrome at Ptolemais/Barkes Limen: ancient horse-racetrack at Ptolemais (Greek Πτολεμαὶς), Cyrenaica, Libya, near Tolmeita; one of the city's spectacle venues with an amphitheater and three theaters, at the base of the acropolis.
Hippodrome of Constantinople
Hippodrome of Constantinople: Byzantine chariot-racing circus begun under Septimius Severus and completed by Constantine I by 330 AD, modeled on Rome's Circus Maximus, home of the Blues and Greens factions and the Nika Revolt of 532.
Hippodrome of Olympia
The Hippodrome of Olympia was the equestrian racecourse of the ancient Olympic Games in Elis, Greece, and is the only major Olympic venue never excavated, buried by flooding of the Alpheios river.
Hippoglossoides platessoides
Hippoglossoides platessoides, the American plaice (also Canadian plaice, long rough dab), is a right-eyed North Atlantic flatfish of the family Pleuronectidae, living on soft bottoms from Labrador to Rhode Island and the eastern Atlantic, managed as a groundfish fishery.
Hippoglossus hippoglossus
Hippoglossus hippoglossus, the Atlantic halibut, is the world's largest flatfish, a right-eyed demersal predator of the North Atlantic. Distinguished from Pacific halibut (Hippoglossus stenolepis) by scale, fin, and body shape; US stock overfished with a 2055 rebuilding target.
Hippoglossus stenolepis
Hippoglossus stenolepis, the Pacific halibut, is a large right-eyed flatfish native to the North Pacific from Japan to Baja California, reaching over 500 pounds.
Hippogriff
Hippogriff (ippogrifo), legendary creature with a griffin's head, wings, and foreparts and a horse's hindquarters, invented by Ariosto in Orlando Furioso (1516) as offspring of griffin and mare; distinct from Pegasus and the griffin, later famous via Harry Potter's Buckbeak.
Hippola
Hippola (Ἵππολα), ancient Laconian town northwest of Taenarum in the Mani, Peloponnese; known from Pausanias 3.25.9 for ruins and a sanctuary of Athena Hippolaitis; possibly near Kipoula.
Hippolais
Hippolais is a genus of Acrocephalidae warblers established by Conrad von Baldenstein in 1827, holding Icterine, Upcher's, Olive-tree, and Melodious Warblers; molecular work shows the traditional genus limits are non-monophyletic.
Hippology
Hippology is the study of the horse (Greek hippo + ology), best known as a 4-H youth contest with four phases: written and slide exam, identification stations, horse judging, and team problem solving.
Hippolyt Kempf
Hippolyt Marcel Kempf, Swiss Nordic combined skier born 1965 in Lucerne; Olympic individual gold and team silver at Calgary 1988, team bronze 1994; first Swiss Olympic champion in Nordic combined; later Swiss-Ski Nordic sports head.
Hippolyta (DC Comics)
Hippolyta, DC Comics' Queen of the Amazons and mother of Wonder Woman, debuted in All-Star Comics #8 (1941); she served as Wonder Woman herself in Wonder Woman #128-172 (1997-2001) and is played by Connie Nielsen in film.
Hippolyta (Ἱππολύτη)
Hippolyta (Ἱππολύτη), also Hippolyte, Greek mythological queen of the Amazons, daughter of Ares and Otrera, owner of Ares' war belt sought by Heracles in his ninth labor; distinct from sister Antiope, Theseus's captive, and from the DC Comics queen.
Hippolyte Bayard
Hippolyte Bayard (1801–1887) was a French inventor who independently invented direct positive photography on paper in 1839 and made the staged Self-Portrait as a Drowned Man (1840).
Hippolytus (Ἱππόλυτος) (play)
Hippolytus (Ἱππόλυτος) is Euripides' extant tragedy (Hippolytus Stephanephoros), staged 428 BC at the City Dionysia with first prize, retelling Aphrodite's revenge on chaste Hippolytus through Phaedra's passion and false accusation, distinct from his lost earlier Hippolytus Kalyptomenos.
Hippolytus of Athens
Hippolytus (Ἱππόλυτος), son of Theseus and an Amazon, is the chaste Greek hero falsely accused by his stepmother Phaedra and killed by Poseidon's bull; known from Euripides' 428 BCE tragedy, Seneca, Racine, and his hero cult at Troezen.
Hippolytus of Rome
Hippolytus of Rome, also known as Saint Hippolytus or Antipope Hippolytus, was a third-century Christian theologian of Rome, traditionally the first antipope and honored as a martyr.
Hippophae
Hippophae (sea buckthorn, 沙棘属), spiny dioecious Elaeagnaceae shrubs with seven species from Europe to the Himalaya; H. rhamnoides fixes nitrogen via Frankia and yields vitamin-rich, omega-7 oil berries bred into over 150 cultivars.
Hippophae rhamnoides
Hippophae rhamnoides, sea buckthorn (Elaeagnaceae), a hardy nitrogen-fixing Eurasian shrub with seven subspecies, orange vitamin-rich berries used in food and traditional medicine, and limited clinical evidence of benefit.
Hippopotamidae
Hippopotamidae, the hippopotamus family, comprises the common hippo (Hippopotamus amphibius) and pygmy hippo (Choeropsis liberiensis), semi-aquatic artiodactyls that are the living sister group of whales, with fossil relatives across Africa, Europe, and Asia.
Hippopotamus
The hippopotamus (Hippopotamus amphibius), also called the common or Nile hippopotamus, is a large semiaquatic herbivorous mammal native to sub-Saharan African rivers and lakes, and the closest living relative of whales.
Hippopotamus optimization
Hippopotamus optimization, also known as the hippopotamus optimization algorithm, is a nature-inspired metaheuristic that mimics hippopotamus behaviors to solve continuous optimization problems, introduced by Mohammad Hussein Amiri and colleagues in Scientific Reports in 2024.