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Glossary · Nouns · H

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TermTypeDefinitionClassificationsUpdated
Hnounthe constant of proportionality relating the energy of a photon to its frequencyverifiedMay 18, 2026
H-Bombnouna nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form heliumverifiedMay 18, 2026
Ha-Hanouna loud laugh that sounds like a horse neighingverifiedMay 18, 2026
Ha'p'orthnounthe amount that can be bought for a halfpennyverifiedMay 18, 2026
Ha'pennynounan English coin worth half a pennyverifiedMay 18, 2026
Habaneranounmusic composed in duple time for dancing the habaneraverifiedMay 18, 2026
Habeas CorpusnounMWEthe civil right to obtain a writ of habeas corpus as protection against illegal imprisonmentverifiedMay 18, 2026
Haberdashernouna merchant who sells men's clothingverifiedMay 18, 2026
Haberdasherynouna store where men's clothes are soldverifiedMay 18, 2026
Haberdashery StorenounMWEa store where men's clothes are soldverifiedMay 18, 2026
Habergeonnouna light sleeveless coat of chain mail worn under the hauberk in the Middle AgesverifiedMay 18, 2026
Habilimentnouna covering designed to be worn on a person's bodyverifiedMay 18, 2026
Habitabilitynounsuitability for living in or onverifiedMay 18, 2026
Habitablenessnounsuitability for living in or onverifiedMay 18, 2026
Habitantnouna person who inhabits a particular placeverifiedMay 18, 2026
Habitatnounthe type of environment in which an organism or group normally lives or occursverifiedMay 18, 2026
Habitationnounthe act of dwelling in or living permanently in a placeverifiedMay 18, 2026
Habitual AbortionnounMWErepeated spontaneous abortion (often for no known reason)verifiedMay 18, 2026
Habitual CriminalnounMWEsomeone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior)verifiedMay 18, 2026
Habituationnounbeing abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)verifiedMay 18, 2026
Habitudenounhabitual mode of behaviorverifiedMay 18, 2026
Habituenouna regular patronverifiedMay 18, 2026
Habitusnounperson's predisposition to be affected by something (as a disease)verifiedMay 18, 2026
Haceknounan inverted circumflex placed as a diacritical mark above certain letters to indicate pronunciationverifiedMay 18, 2026
Hachurenounshading consisting of multiple crossing linesverifiedMay 18, 2026
Haciendanouna large estate in Spanish-speaking countriesverifiedMay 18, 2026
Hack DrivernounMWEsomeone who drives a taxi for a livingverifiedMay 18, 2026
Hack WriternounMWEa mediocre and disdained writerverifiedMay 18, 2026
Hackamorenounrope or canvas headgear for a horse, with a rope for leadingverifiedMay 18, 2026
Hackberrynounany of various trees of the genus Celtis having inconspicuous flowers and small berrylike fruitsverifiedMay 18, 2026
Hackbutnounan obsolete firearm with a long barrelverifiedMay 18, 2026
Hackeenounsmall striped semiterrestrial eastern American squirrel with cheek pouchesverifiedMay 18, 2026
HackernounUnauthorized user who attempts to or gains access to an information system.ThreatMay 9, 2026
Hackmatacknounpoplar of northeastern North America with broad heart-shaped leavesverifiedMay 18, 2026
Hackneynouna compact breed of harness horseverifiedMay 18, 2026
Hackney CarriagenounMWEa London-style taxi, or black cabverifiedMay 18, 2026
Hackney CoachnounMWEa carriage for hireverifiedMay 18, 2026
Hacksawnounsaw used with one hand for cutting metalverifiedMay 18, 2026
Hackworknounprofessional work done according to formulaverifiedMay 18, 2026
Haddocknounlean white flesh of fish similar to but smaller than codverifiedMay 18, 2026
Hadithnoun(Islam) the way of life prescribed as normative for Muslims on the basis of the teachings and practices of Muhammad and interpretations of the KoranverifiedMay 18, 2026
Hadjnounthe fifth pillar of Islam is a pilgrimage to Mecca during the month of Dhu al-HijjaverifiedMay 18, 2026
Hadjinounan Arabic term of respect for someone who has made the pilgrimage to MeccaverifiedMay 18, 2026
Hadronnounany elementary particle that interacts strongly with other particlesverifiedMay 18, 2026
Hadrosaurnounany of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feetverifiedMay 18, 2026
Hadrosaurusnounany of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feetverifiedMay 18, 2026
Haecceitynounthe essence that makes something the kind of thing it is and makes it different from any otherverifiedMay 18, 2026
Haemnouna complex red organic pigment containing iron and other atoms to which oxygen bindsverifiedMay 18, 2026
Haemagglutinationnounagglutination of red blood cellsverifiedMay 18, 2026
Haemal ArchnounMWEa structure arising ventrally from a vertebral centrum and enclosing the caudal blood vesselsverifiedMay 18, 2026
Haemangiomanounbenign angioma consisting of a mass of blood vesselsverifiedMay 18, 2026
Haematemesisnounvomiting bloodverifiedMay 18, 2026
Haematinicnouna medicine that increases the hemoglobin content of the bloodverifiedMay 18, 2026
Haematitenounthe principal form of iron oreverifiedMay 18, 2026
Haematocelenounswelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis)verifiedMay 18, 2026
Haematochezianounpassage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer)verifiedMay 18, 2026
Haematocoelenounswelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis)verifiedMay 18, 2026
Haematocolpometranounaccumulation of blood in the vagina and uterusverifiedMay 18, 2026
Haematocolposnounaccumulation of menstrual blood in the vagina (usually due to an imperforate hymen)verifiedMay 18, 2026
Haematocritnouna measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the bloodverifiedMay 18, 2026
Haematocytopenianounan abnormally low number of red blood cells in the bloodverifiedMay 18, 2026
Haematocyturianounthe presence of red blood cells in the urineverifiedMay 18, 2026
Haematogenesisnounthe formation of blood cells in the living body (especially in the bone marrow)verifiedMay 18, 2026
Haematohistonnouna colorless protein obtained by removing heme from hemoglobinverifiedMay 18, 2026
Haematoidinnounan orange-yellow pigment in the bile that forms as a product of hemoglobinverifiedMay 18, 2026
Haematologistnouna doctor who specializes in diseases of the blood and blood-forming organsverifiedMay 18, 2026
Haematologynounthe branch of medicine that deals with diseases of the blood and blood-forming organsverifiedMay 18, 2026
Haematolysisnounlysis of erythrocytes with the release of hemoglobinverifiedMay 18, 2026
Haematomanouna localized swelling filled with bloodverifiedMay 18, 2026
Haematopoiesisnounthe formation of blood cells in the living body (especially in the bone marrow)verifiedMay 18, 2026
Haematurianounthe presence of blood in the urineverifiedMay 18, 2026
Haemitinnouna complex red organic pigment containing iron and other atoms to which oxygen bindsverifiedMay 18, 2026
Haemodialysisnoundialysis of the blood to remove toxic substances or metabolic wastes from the bloodstreamverifiedMay 18, 2026
Haemogenesisnounthe formation of blood cells in the living body (especially in the bone marrow)verifiedMay 18, 2026
Haemoglobinnouna hemoprotein composed of globin and heme that gives red blood cells their characteristic colorverifiedMay 18, 2026
Haemoglobinemianounpresence of excessive hemoglobin in the blood plasmaverifiedMay 18, 2026
Haemoglobinopathynouna blood disease characterized by the presence of abnormal hemoglobins in the bloodverifiedMay 18, 2026
Haemoglobinurianounpresence of hemoglobin in the urineverifiedMay 18, 2026
Haemolysinnounany substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobinverifiedMay 18, 2026
Haemolysisnounlysis of erythrocytes with the release of hemoglobinverifiedMay 18, 2026
Haemolytic AnaemianounMWEanemia resulting from destruction of erythrocytesverifiedMay 18, 2026
Haemophilenounsomeone who has hemophilia and is subject to uncontrollable bleedingverifiedMay 18, 2026
Haemophilianouncongenital tendency to uncontrolled bleedingverifiedMay 18, 2026
Haemophilia anounMWEhemophilia caused by a congenital deficiency of factor VIIIverifiedMay 18, 2026
Haemophilia BnounMWEa clotting disorder similar to hemophilia A but caused by a congenital deficiency of factor IXverifiedMay 18, 2026
Haemophiliacnounsomeone who has hemophilia and is subject to uncontrollable bleedingverifiedMay 18, 2026
Haemopoiesisnounthe formation of blood cells in the living body (especially in the bone marrow)verifiedMay 18, 2026
Haemoproteidnounrelated to malaria parasite and having a phase in the viscera of various birdsverifiedMay 18, 2026
Haemoproteinnouna conjugated protein linked to a compound of iron and porphyrinverifiedMay 18, 2026
Haemoptysisnouncoughing up blood from the respiratory tractverifiedMay 18, 2026
Haemorrhagenounthe flow of blood from a ruptured blood vesselverifiedMay 18, 2026
Haemorrhagic FevernounMWEa group of illnesses caused by a viral infection (usually restricted to a specific geographic area)verifiedMay 18, 2026
Haemorrhagic StrokenounMWEstroke caused by the rupture of a blood vessel in the brainverifiedMay 18, 2026
Haemorrhoidnounpain caused by venous swelling at or inside the anal sphincterverifiedMay 18, 2026
Haemorrhoidectomynounsurgical procedure for tying hemorrhoids and excising themverifiedMay 18, 2026
Haemosiderinnouna granular brown substance composed of ferric oxideverifiedMay 18, 2026
Haemosiderosisnounabnormal deposit of hemosiderinverifiedMay 18, 2026
Haemosporidiannounminute protozoans parasitic at some stage of the life cycle in blood cells of vertebrates including many pathogensverifiedMay 18, 2026
Haemostasianounsurgical procedure of stopping the flow of blood (as with a hemostat)verifiedMay 18, 2026
Haemostasisnounsurgical procedure of stopping the flow of blood (as with a hemostat)verifiedMay 18, 2026