72,234 articles
Hippocamelus antisensis
Hippocamelus antisensis, the taruca or North Andean deer (Quechua Taruka), a Vulnerable Andean cervid from Peru, Bolivia, Chile, and Argentina; 4,162-5,750 mature individuals, 1,800-5,000 m elevation, CITES Appendix I, never in Ecuador.
Hippocampal granule cell
Hippocampal granule cell, dentate gyrus principal neuron (dentate granule cell). Receives entorhinal input, fires ultra-sparsely, sends mossy fibers to CA3 as detonator synapses for pattern separation; generated by adult neurogenesis.
Hippocampal neuron
Hippocampal neuron (Cell Ontology CL:0002608): any neuron with its soma in the hippocampus, including CA1-CA3 pyramidal cells, dentate granule cells, and interneurons; studied for place fields, LTP/LTD plasticity, and memory.
Hippocampal pyramidal neuron
Hippocampal pyramidal neuron (CA pyramidal cell): glutamatergic principal neuron of hippocampal fields CA3, CA2, CA1 and subiculum; receives ~30,000 CA3 synapses in CA1, fires at ~1.4 Hz, and shows marked within-type heterogeneity.
Hippocampus
Hippocampus: seahorse-shaped medial temporal lobe brain structure essential for forming new declarative memories and spatial navigation; subfields DG, CA3, CA2, CA1; defined by H.M. amnesia, place cells, and cognitive map theory.
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.
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 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.
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.
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.
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.
Hippopus hippopus
Hippopus hippopus, horse's hoof or bear paw clam, a Central Indo-Pacific giant clam (Linnaeus 1758); IUCN Vulnerable A2acd (2024), 40% decline over ~45 years, CITES Appendix II, proposed ESA threatened.
Hipposideridae
Hipposideridae, the Old World leaf-nosed bats, is a family of about 90 insectivorous bat species in seven genera across the Paleotropics, sister to Rhinolophidae, with nostril-emitted constant-frequency echolocation and a noseleaf.
Hipposideros
Hipposideros (roundleaf bats) is the largest genus of Old World leaf-nosed bats, family Hipposideridae, established by Gray in 1831; about 76 species across Africa, Asia, Australia, and Pacific islands, with extensive cryptic diversity and Eocene African origins.
Hippotherapy
Hippotherapy is a rehabilitation therapy in which a licensed therapist uses a walking horse's rhythmic movement to improve balance and motor function, mainly in cerebral palsy and multiple sclerosis.
Hippotragus
Hippotragus (Sundevall, 1845) is an African bovid antelope genus holding the roan antelope, sable antelopes including Roosevelt's sable and the critically endangered giant sable, and the extinct bluebuck; selective grazers tied to water.
Hippurites
Hippurites (Lamarck, 1801) is an extinct genus of hippuritid rudist bivalves from Cretaceous Tethyan carbonate platforms, with a conical attached right valve and lid-like left valve, extinct at the end-Cretaceous mass extinction.
Hippuritidae
Hippuritidae is an extinct family of rudist bivalves, marine molluscs with one valve cemented to the sea floor, that dominated tropical Late Cretaceous seas of the Tethys and Caribbean.
Hiranyagarbha pottali rasa
Hiranyagarbha pottali rasa (हिरण्यगर्भ पोट्टली रस), a gold-containing variant of Hemagarbha Pottali in Ayurvedic Rasashastra: mercury, sulfur, and swarna bhasma processed into a compact pottali pill used in minute doses for fever, cough, and critical care.
Hirji S. Adenwalla
Hirji Sorab Adenwalla (1930-2020), Indian cleft surgeon and medical missionary; founded the Charles Pinto Centre for Cleft Lip and Palate at Jubilee Mission Hospital, Thrissur, Kerala; 16,000+ surgeries; Smile Train partner; McCarthy Award.
Hiro Furukawa
Hiro Furukawa is a structural neuroscientist and professor at Cold Spring Harbor Laboratory in New York, known for mapping how NMDA receptors open and bind drugs.
Hiroaki Hemmi
Hiroaki Hemmi (邊見 弘明) is a Japanese immunologist known for the 2000 Nature paper identifying TLR9 as the receptor for bacterial DNA, and later TLR7 and TLR8 work.
Hiroaki Kitano
Hiroaki Kitano is a Japanese researcher who helped pioneer systems biology, is President and CEO of Sony Computer Science Laboratories, and led the AI agent that beat champion Gran Turismo drivers.
Hiroaki Matsunami
Hiroaki Matsunami (松波宏明) is a Japanese-born neuroscientist at Duke University who studies the molecular basis of smell, known for identifying the V2R pheromone receptor family and cryo-EM structures of human odorant receptors.