Glossary · Nouns · H
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TermTypeDefinitionClassificationsUpdated
Hematocritnouna measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the bloodverified
Hematogenesisnounthe formation of blood cells in the living body (especially in the bone marrow)verified
Hematologynounthe branch of medicine that deals with diseases of the blood and blood-forming organsverified
Hemiacetalnounan organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketonesverified
Hemidemisemiquavernouna musical note having the time value of a sixty-fourth of a whole noteverified
Hemiparasitenouna parasitic plant that contains some chlorophyll and therefore is capable of photosynthesisverified
Hemipodenounsmall quail-like terrestrial bird of southern Eurasia and northern Africa that lacks a hind toeverified
Hemipterannouninsects with sucking mouthparts and forewings thickened and leathery at the baseverified
Hemipteronnouninsects with sucking mouthparts and forewings thickened and leathery at the baseverified
Hemipterous InsectnounMWEinsects with sucking mouthparts and forewings thickened and leathery at the baseverified
Hemlocknounlarge branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowersverified
Hemlock Water DropwortnounMWEEuropean poisonous herb having tuberous roots, yellow juice that stains the skin, yellow flowers and foliage resembling celeryverified
Hemodialysisnoundialysis of the blood to remove toxic substances or metabolic wastes from the bloodstreamverified
Hemodialyzernouna machine that uses dialysis to remove impurities and waste products from the bloodstream before returning the blood to the patient's bodyverified
Hemodynamicsnounthe branch of physiology that studies the circulation of the blood and the forces involvedverified
Hemogenesisnounthe formation of blood cells in the living body (especially in the bone marrow)verified
Hemoglobinnouna hemoprotein composed of globin and heme that gives red blood cells their characteristic colorverified
Hemoglobinopathynouna blood disease characterized by the presence of abnormal hemoglobins in the bloodverified
Hemolysinnounany substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobinverified
Hemophilia BnounMWEa clotting disorder similar to hemophilia A but caused by a congenital deficiency of factor IXverified
Hemorrhagic FevernounMWEa group of illnesses caused by a viral infection (usually restricted to a specific geographic area)verified
Hemorrhagic SepticemianounMWEan acute infectious disease characterized by pneumonia and blood infectionverified
Hemorrhoidal VeinnounMWEany of several veins draining the walls of the anal canal and rectumverified
Hemothoraxnounaccumulation of blood in the pleural cavity (the space between the lungs and the walls of the chest)verified
Hempnouna rope that is used by a hangman to execute persons who have been condemned to death by hangingverified
Hemp AgrimonynounMWEcoarse European herb with palmately divided leaves and clusters of small reddish-purple flower headsverified
Hemp FamilynounMWEtwo genera of erect or twining herbs that are pollinated by the wind, including the genera Cannabis and Humulusverified
Hemp NettlenounMWEcoarse bristly Eurasian plant with white or reddish flowers and foliage resembling that of a nettleverified
Hempen NecktienounMWEa rope that is used by a hangman to execute persons who have been condemned to death by hangingverified
Hemstitchingnouna stitch in which parallel threads are drawn and exposed threads are caught together in groupsverified
Hen-Of-The-Woodsnounlarge greyish-brown edible fungus forming a mass of overlapping caps that somewhat resembles a hen at the base of treesverified
Henbanenounpoisonous fetid Old World herb having sticky hairy leaves and yellow-brown flowersverified
HenbitnounEurasian plant having toothed leaves and small two-lipped white or purplish-red flowersverified
Henrynouna unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per secondverified
Hepadnavirusnouna group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humansverified
Heparinnouna polysaccharide produced in basophils (especially in the lung and liver) and that inhibits the activity of thrombin in coagulation of the bloodverified