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Glossary · Nouns · H

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TermTypeDefinitionClassificationsUpdated
Herpes EncephalitisnounMWEcommon form of acute encephalitis caused by herpes simplex 1verifiedMay 18, 2026
Herpes GenitalisnounMWEan infection caused by herpes simplex virus type 2 (HSV-2) that is usually transmitted by sexual contactverifiedMay 18, 2026
Herpes LabialisnounMWEcaused by herpes simplex virus type 1 (HSV-1)verifiedMay 18, 2026
Herpes SimplexnounMWEa herpes virus that affects the skin and nervous systemverifiedMay 18, 2026
Herpes Simplex 1nounMWEa herpes virus that causes oral herpesverifiedMay 18, 2026
Herpes Simplex 2nounMWEa herpes virus that can cause genital herpesverifiedMay 18, 2026
Herpes Simplex EncephalitisnounMWEcommon form of acute encephalitis caused by herpes simplex 1verifiedMay 18, 2026
Herpes Simplex VirusnounMWEa herpes virus that affects the skin and nervous systemverifiedMay 18, 2026
Herpes Varicella ZosternounMWEa herpes virus that causes chickenpox and shinglesverifiedMay 18, 2026
Herpes Varicella Zoster VirusnounMWEa herpes virus that causes chickenpox and shinglesverifiedMay 18, 2026
Herpes VirusnounMWEany of the animal viruses that cause painful blisters on the skinverifiedMay 18, 2026
Herpes ZosternounMWEeruptions along a nerve path often accompanied by severe neuralgiaverifiedMay 18, 2026
Herpes Zoster VirusnounMWEa herpes virus that causes shinglesverifiedMay 18, 2026
Herpetologistnouna zoologist who studies reptiles and amphibiansverifiedMay 18, 2026
Herpetologynounthe branch of zoology concerned with reptiles and amphibiansverifiedMay 18, 2026
Herrenvolknouna race that considers itself superior to all others and fitted to rule the othersverifiedMay 18, 2026
Herrerasaurnouna kind of theropod dinosaur found in ArgentinaverifiedMay 18, 2026
Herrerasaurusnouna kind of theropod dinosaur found in ArgentinaverifiedMay 18, 2026
Herringnouncommercially important food fish of northern waters of both Atlantic and PacificverifiedMay 18, 2026
Herring GullnounMWElarge gull of the northern hemisphereverifiedMay 18, 2026
Herring HognounMWEthe common porpoise of the northern Atlantic and PacificverifiedMay 18, 2026
Herring SaladnounMWEbased on pickled herringverifiedMay 18, 2026
Herringbonenouna pattern of columns of short parallel lines with all the lines in one column sloping one way and lines in adjacent columns sloping the other wayverifiedMay 18, 2026
Herringbone PatternnounMWEa pattern of columns of short parallel lines with all the lines in one column sloping one way and lines in adjacent columns sloping the other wayverifiedMay 18, 2026
Hertznounthe unit of frequencyverifiedMay 18, 2026
Hesitancenouna feeling of diffidence and indecision about doing somethingverifiedMay 18, 2026
Hesitancynouna feeling of diffidence and indecision about doing somethingverifiedMay 18, 2026
Hesitaternounone who hesitates (usually out of fear)verifiedMay 18, 2026
Hesitationnouna certain degree of unwillingnessverifiedMay 18, 2026
Hesitatornounone who hesitates (usually out of fear)verifiedMay 18, 2026
Hessiannoun(19th century) a man's high tasseled bootverifiedMay 18, 2026
Hessonitenouna garnet ranging in color from yellow to brownverifiedMay 18, 2026
Heterocercal FinnounMWEa tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharksverifiedMay 18, 2026
Heterocyclenouna compound containing a heterocyclic ringverifiedMay 18, 2026
Heterocyclic CompoundnounMWEa compound containing a heterocyclic ringverifiedMay 18, 2026
Heterocyclic RingnounMWEa ring of atoms of more than one kindverifiedMay 18, 2026
Heterodactyl FootnounMWEa bird's foot having the first and second toes of each foot directed backward and the third and fourth forwardverifiedMay 18, 2026
Heterodoxynounany opinions or doctrines at variance with the official or orthodox positionverifiedMay 18, 2026
Heterodyne OscillatornounMWEan oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tonesverifiedMay 18, 2026
Heterodyne ReceivernounMWEa radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplifiedverifiedMay 18, 2026
Heterogeneitynounthe quality of being diverse and not comparable in kindverifiedMay 18, 2026
Heterogeneousnessnounthe quality of being diverse and not comparable in kindverifiedMay 18, 2026
Heterogenesisnounthe alternation of two or more different forms in the life cycle of a plant or animalverifiedMay 18, 2026
Heterograftnountissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another speciesverifiedMay 18, 2026
Heterologynounthe lack of correspondence of apparently similar biological featuresverifiedMay 18, 2026
Heterometabolismnoundevelopment of insects with incomplete metamorphosis in which no pupal stage precedes maturityverifiedMay 18, 2026
Heterometabolynoundevelopment of insects with incomplete metamorphosis in which no pupal stage precedes maturityverifiedMay 18, 2026
Heteronymnountwo words are heteronyms if they are spelled the same way but differ in pronunciationverifiedMay 18, 2026
Heterophil AntibodynounMWEan antibody found in the blood of someone suffering from infectious mononucleosisverifiedMay 18, 2026
Heterophil TestnounMWEa blood test to detect heterophil antibodies that agglutinate sheep red blood cellsverifiedMay 18, 2026
Heterophile AntibodynounMWEan antibody found in the blood of someone suffering from infectious mononucleosisverifiedMay 18, 2026
Heteroploidnoun(genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that speciesverifiedMay 18, 2026
Heteroploidynounthe condition of being heteroploidverifiedMay 18, 2026
Heteropterous InsectnounMWEtrue bugs: insects whose forewings are membranous but have leathery tipsverifiedMay 18, 2026
Heterosexismnoundiscrimination in favor of heterosexual and against homosexual peopleverifiedMay 18, 2026
Heterosexual PersonnounMWEa heterosexual personverifiedMay 18, 2026
Heterosexualismnouna sexual attraction to (or sexual relations with) persons of the opposite sexverifiedMay 18, 2026
Heterosexualitynouna sexual attraction to (or sexual relations with) persons of the opposite sexverifiedMay 18, 2026
Heterosporynounthe development of both microspores and megasporesverifiedMay 18, 2026
Heterostracannounextinct jawless fish with the anterior part of the body covered with bony platesverifiedMay 18, 2026
Heterotaxynounany abnormal position of the organs of the bodyverifiedMay 18, 2026
Heterotrophnounan organism that depends on complex organic substances for nutritionverifiedMay 18, 2026
Heterozygositynounthe state of being heterozygousverifiedMay 18, 2026
Heterozygotenoun(genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspringverifiedMay 18, 2026
Hethnounthe 8th letter of the Hebrew alphabetverifiedMay 18, 2026
Heulanditenouna group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calciumverifiedMay 18, 2026
Heuristic ProgramnounMWEa commonsense rule (or set of rules) intended to increase the probability of solving some problemverifiedMay 18, 2026
Heuristic RulenounMWEa commonsense rule (or set of rules) intended to increase the probability of solving some problemverifiedMay 18, 2026
Hewernouna person who hewsverifiedMay 18, 2026
Hex NutnounMWEa nut with a hexagonal shapeverifiedMay 18, 2026
Hexachlorophenenounantibacterial substance that is a water-soluble powder used in antiseptic soaps and toothpasteverifiedMay 18, 2026
Hexacosanoic AcidnounMWEa white solid fatty acid found in waxes (such as beeswax)verifiedMay 18, 2026
Hexadnounthe cardinal number that is the sum of five and oneverifiedMay 18, 2026
Hexadecanoic AcidnounMWEa saturated fatty acid that is the major fat in meat and dairy productsverifiedMay 18, 2026
Hexadecimal DigitnounMWEa digit from 0 to 15 in hexadecimal notationverifiedMay 18, 2026
Hexadecimal NotationnounMWEany notation that uses 16 different charactersverifiedMay 18, 2026
Hexadecimal Number SystemnounMWEa positional system of numeration that uses hexadecimal digits and a radix of sixteenverifiedMay 18, 2026
Hexadecimal SystemnounMWEa positional system of numeration that uses hexadecimal digits and a radix of sixteenverifiedMay 18, 2026
Hexagonnouna six-sided polygonverifiedMay 18, 2026
Hexagramnouna regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral trianglesverifiedMay 18, 2026
Hexahedronnounany polyhedron having six plane facesverifiedMay 18, 2026
Hexameternouna verse line having six metrical feetverifiedMay 18, 2026
Hexanenouna colorless flammable liquid alkane derived from petroleum and used as a solventverifiedMay 18, 2026
Hexanedioic AcidnounMWEa carboxylic acid used in the manufacture of nylonverifiedMay 18, 2026
Hexanoic AcidnounMWEa fatty acid found in animal oils and fats or made syntheticallyverifiedMay 18, 2026
Hexapodnounan animal having six feetverifiedMay 18, 2026
Hexenbesennounan abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbanceverifiedMay 18, 2026
Hexestrolnounestrogen compound used to treat menstrual irregularities and menopausal symptoms and to prevent pregnancyverifiedMay 18, 2026
Hexosenouna monosaccharide that contains six carbon atoms per moleculeverifiedMay 18, 2026
Heydaynounthe period of greatest prosperity or productivityverifiedMay 18, 2026
Hgnoun100 gramsverifiedMay 18, 2026
Hinounan expression of greetingverifiedMay 18, 2026
Hiatal HernianounMWEhernia resulting from the protrusion of part of the stomach through the diaphragmverifiedMay 18, 2026
Hiatusnouna natural opening or perforation through a bone or a membranous structureverifiedMay 18, 2026
Hiatus HernianounMWEhernia resulting from the protrusion of part of the stomach through the diaphragmverifiedMay 18, 2026
Hiba ArborvitaenounMWEslow-growing medium-large Japanese evergreen used as an ornamentalverifiedMay 18, 2026
Hibernationnounthe torpid or resting state in which some animals pass the winterverifiedMay 18, 2026
Hibiscusnounany plant of the genus HibiscusverifiedMay 18, 2026
Hiccough NutnounMWEornamental African shrub or climber with red flowersverifiedMay 18, 2026
Hiccup NutnounMWEornamental African shrub or climber with red flowersverifiedMay 18, 2026