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Medical Dictionary


hemophilic (he-mo-fil′ik)
Relating to hemophilia.

hemophilosis (he-mo-fil-o′sis)
Any disease caused by bacteria of the genus Haemophilus.

hemophobia (he-mo-fo′be-a)
Morbid fear of blood or of bleeding. [hemo- + G. phobos, fear]

hemophoresis (he′mo-fo-re′sis)
Blood convection or irrigation of tissues. [hemo- + G. phoreo, to bear]

hemophthalmia, hemophthalmus (he-mof-thal′me-ah, -mof-thal′mus)
A blood-filled eye. SYN: hematopsia. [hemo- + G. ophthalmos, eye]

hemophthisis (he-mof′thi-sis, he-mof-thi′sis)
An obsolete term for anemia resulting from abnormal degeneration or destruction, or a deficiency in the formation of red blood cells. [hemo- + G. phthisis, a wasting away]

hemoplastic (he-mo-plas′tik)
SYN: hemopoietic.

hemoplasty (he′mo-plas-te)
Formation or elaboration of blood by the hemopoietic tissues. [hemo- + G. plasso, to form]

hemopneumopericardium (he′mo-noo′mo-par-i-kar′de-um)
Concurrence of blood and air in the pericardium. SYN: pneumohemopericardium. [hemo- + G. pneuma, air, + pericardium]

hemopneumothorax (he′mo-noo-mo-tho′raks)
Accumulation of air and blood in the pleural cavity. SYN: pneumohemothorax. [hemo- + G. pneuma, air, + thorax]

hemopoiesis (he′mo-poy-e′sis)
The process of formation and development of the various types of blood cells and other formed elements. SYN: hematogenesis, hematopoiesis, hematosis (1) , hemogenesis, sanguification. [hemo- + G. poiesis, a making]

hemopoietic (he′mo-poy-et′ik)
Pertaining to or related to the formation of blood cells. SYN: hemafacient, hematogenic (1) , hematogenous, hematoplastic, hematopoietic, hemogenic, hemoplastic, sanguifacient.

hemopoietin (he-mo-poy′e-tin)
SYN: erythropoietin.

hemoporphyrin (he-mo-por′fi-rin)
SYN: hematoporphyrin.

hemoprecipitin (he′mo-pre-sip′i-tin)
An antibody that combines with and precipitates soluble antigenic material from erythrocytes.

hemoprotein (he-mo-pro′ten)
Protein linked to a metal-porphyrin compound ( e.g., cytochromes, myoglobin, catalase).

hemoptysis (he-mop′ti-sis)
Spitting of blood derived from the lungs or bronchial tubes as a result of pulmonary or bronchial hemorrhage. SYN: bronchostaxis. [hemo- + G. ptysis, a spitting] endemic h. SYN: parasitic h.. parasitic h. the clinical expression of paragonimiasis, marked by a cough and spitting of blood from the lungs. SYN: endemic h..

hemopyelectasis, hemopyelectasia (he′mo-pi′e-lek′ta-sis, -lek-ta′ze-a)
Obsolete term for dilation of the pelvis of the kidney with blood and urine. [hemo- + pyelectasia]

hemorepellant (he′mo-re-pel′ant)
1. A substance or surface that discourages the adherence of blood. 2. Having such an action.

hemorheology (he′mo-re-ol′o-je)
The science of the flow of blood in relation to the pressures, flow, volumes, and resistances in blood vessels, especially in terms of blood viscosity and red cell deformation in the microcirculation. [hemo- + G. rheos, stream, flow, + logos, study]

hemorrhage (hem′o-rij)
1. An escape of blood from the intravascular space. 2. To bleed. [G. haimorrhagia, fr. haima, blood, + rhegnymi, to burst forth] brainstem h. h. into the pons or mesencephalon, often secondary to brainstem distortion by transtentorial herniations due to rapidly expanding intracranial lesions. cerebral h. h. into the substance of the cerebrum, usually in the region of the internal capsule by the rupture of the lenticulostriate artery. SYN: hematencephalon, intracerebral h.. concealed h. SYN: internal h.. Duret h. small brainstem h. resulting from brainstem distortion secondary to transtentorial herniation. extradural h. an accumulation of blood between the skull and the dura mater. SYN: epidural hematoma. gastric h. SYN: gastrorrhagia. intermediate h. h. that is recurrent. internal h. bleeding into organs or cavities of the body. SYN: concealed h.. intracerebral h. SYN: cerebral h.. intracranial h. bleeding within the cranial vault; includes cerebral h. and subarachnoid h.. intrapartum h. h. occurring in the course of normal labor and delivery. intraventricular h. extravasation of blood into the ventricular system of the brain. nasal h. SYN: epistaxis. parenchymatous h. bleeding into the substance of an organ. h. per rhexis h. due to the rupture of a blood vessel. petechial h. capillary h. into the skin that forms petechiae. SYN: punctate h.. pontine h. h. occurring in the substance of the pons, typically in hypertensive patients. postpartum h. h. from the birth canal in excess of 500 ml after a vaginal delivery or 1000 mL after a cesarean delivery during the first 24 hours after birth. primary h. h. immediately after an injury or operation, as distinguished from intermediate or secondary h.. punctate h. SYN: petechial h.. renal h. hematuria, of which the kidney is the source. secondary h. h. at an interval after an injury or an operation. serous h. obsolete term for a profuse transudation of plasma through the walls of the capillaries. splinter hemorrhages tiny longitudinal subungual hemorrhages typically seen in but not diagnostic of bacterial endocarditis, trichinosis, etc. subarachnoid h. extravasation of blood into the subarachnoid space, often due to aneurysm rupture and usually spreading throughout the cerebrospinal fluid pathways. subdural h. extravasation of blood between the dural and arachnoidal membranes; acute and chronic forms occur; chronic hematomas may become encapsulated by neomembranes. SYN: subdural hematoma. subgaleal h. collection of blood beneath the galea aponeurotica. syringomyelic h. h. into a syringomyelic cavity.

hemorrhagic (hem-o-raj′ik)
Relating to or marked by hemorrhage.

hemorrhagins (hem-o-raj′inz, -ra′jins)
Cytolysins found in certain venoms and poisonous material from some plants, e.g., rattlesnake venom and ricin; h. cause degeneration and lysis of endothelial cells in capillaries and small vessels, thereby resulting in numerous small hemorrhages in the tissues. [hemorrhage + -in]

hemorrhoid (hem′o-royd)
Denoting one of the tumors or varices constituting hemorrhoids.

hemorrhoidal (hem-o-roy′dal)
1. Relating to hemorrhoids. 2. Formerly applied to certain arteries and veins supplying the region of the rectum and anus, currently described by “anal” or “rectal.”

hemorrhoidectomy (hem′o-roy-dek′to-me)
Surgical removal of hemorrhoids; usually accomplished by excision of hemorrhoidal tissues by sharp dissection, or by application of elastic ligature at the base of the hemorrhoidal bundles to produce ischemic necrosis and ultimate ablation of the h.. [hemorrhoids + G. ektome, excision]

hemorrhoids (hem′o-roydz)
A varicose condition of the external hemorrhoidal veins causing painful swellings at the anus. SYN: piles. [G. haimorrhois, pl. haimorrhoides, veins likely to bleed, fr. haima, blood, + rhoia, a flow] cutaneous h. hyperplasia of the connective tissue in one or more of the normal radiating folds of the skin immediately surrounding the anus. external h. dilated veins forming tumors at the outer side of the external sphincter. internal h. dilated veins beneath the mucous membrane within the sphincter.

hemosalpinx (he′mo-sal′pinks)
SYN: hematosalpinx.

hemosialemesis (he′mo-si-al-em′e-sis)
Vomiting of blood and saliva. [hemo- + G. sialon, saliva, + emesis, vomiting]

hemosiderin (he-mo-sid′er-in)
A golden yellow or yellow-brown insoluble protein produced by phagocytic digestion of hematin; found in most tissues, especially in the liver, spleen, and bone marrow, in the form of granules much larger than ferritin molecules (of which they are believed to be aggregates), but with a higher content, as much as 37%, of iron; stains blue with Perl Prussian blue stain. [hemo- + G. sideros, iron, + -in]

hemosiderosis (he′mo-sid-er-o′sis)
Accumulation of hemosiderin in tissue, particularly in liver and spleen. See hemochromatosis. [hemosiderin + -osis, condition] idiopathic pulmonary h. repeated sudden attacks of dyspnea and hemoptysis leading to diffuse pulmonary h., seen most commonly in children; of unknown cause, but some cases may be associated with Goodpasture syndrome. SYN: Ceelen-Gellerstedt syndrome. nutritional h. a disease that results from ingestion of iron in foodstuffs prepared in iron vessels.

hemospermia (he′mo-sper′me-a)
Presence of blood in the seminal fluid. SYN: hematospermia. [hemo- + G. sperma, seed] h. spuria h. occurring in the prostatic urethra. h. vera h. from the seminal vesicles.

hemosporidium (he′mo-spo-rid′e-um)
A blood parasite of the order Haemosporidia. [hemo- + Mod. L. dim. of G. sporos, seed]

hemosporines (he′mo-spo-renz)
Common term for members of the order Haemosporidia.

hemostasia (he-mo-sta′ze-a)
SYN: hemostasis.

hemostasis (he′mo-sta-sis, he-mos′ta-sis)
1. The arrest of bleeding. 2. The arrest of circulation in a part. 3. Stagnation of blood. SYN: hemostasia. [hemo- + G. stasis, a standing]

hemostat (he′mo-stat)
1. Any agent that arrests, chemically or mechanically, the flow of blood from an open vessel. 2. An instrument for arresting hemorrhage by compression of the bleeding vessel.

hemostatic (he-mo-stat′ik)
1. Arresting the flow of blood within the vessels. 2. SYN: antihemorrhagic.

hemostyptic (he-mo-stip′tik)
SYN: styptic (2) . [hemo- + G. styptikos, astringent]

hemosuccus pancreaticus
Bleeding into the pancreatic duct, usually as a result of trauma, tumor, inflammation, or pseudoaneurysm associated with pseudocyst.

hemotachogram (he-mo-ta′cho-gram)
The record produced by hemotachometer. [hemo + tachos + G. gramma, something written]

hemotachometer (he′mo-ta-kom′e-ter)
An instrument for measuring the rapidity of the flow of blood in the arteries. SYN: hematachometer. [hemo- + G. tachos, swiftness, + metron, measure]

hemotherapy, hemotherapeutics (he′mo-thar′a-pe, thar-a-pu′tiks)
Treatment of disease by the use of blood or blood derivatives, as in transfusion. SYN: hematherapy.

hemothorax (he-mo-thor′aks)
Blood in the pleural cavity. SYN: hemathorax.

hemotoxic, hematotoxic, hematoxic (he-mo-tok′sik; he′ma-to-toks′ik, hem′a-; he-ma-toks′ik, hem-a-)
1. Causing blood poisoning. 2. SYN: hemolytic.

hemotoxin (he-mo-tok′sin)
Any substance that causes destruction of red blood cells, including various hemolysins; usually used with reference to substances of biologic origin, in contrast to chemicals. SYN: hematotoxin, hematoxin. cobra h. the constituent in cobra venom that hemolyzes the red blood cells of various species.

hemotroph, hemotrophe (hem′o-trof)
The nutritive materials supplied to the embryos of placental mammals through the maternal bloodstream. Cf.:embryotroph, histotroph. [hemo- + G. trophe, food]

hemotropic (he-mo-trop′ik)
Pertaining to the mechanism by which a substance in or on blood cells, especially the erythrocytes, attracts phagocytic cells; the latter change direction and migrate toward the h. cells. SYN: hematotropic. [hemo- + G. tropos, direction (or trope, a turning)]

hemotympanum (he′mo-tim′pa-num)
The presence of blood in the middle ear. SYN: hematotympanum.

hemozoic (he-mo-zo′ik)
Parasitic in the blood of vertebrates; denoting certain protozoa. SYN: hematozoic.

hemozoon (he-mo-zo′on)
A blood-dwelling parasitic animal such as the trypanosomes or microfilariae of Wuchereria or Brugia. SYN: hematozoon. [hemo- + G. zoon, animal]

Abbreviation for hereditary erythroblastic multinuclearity associated with positive acidified serum. See H. cells, under cell.

henbane (hen′ban)
SYN: hyoscyamus.

Lawrence J., U.S. biochemist, 1878–1942. See H.-Hasselbalch equation.

Hendersonula toruloidea
SYN: Nattrassia mangiferae.

Wilhelm, German anatomist, 1834–1896. See H. space.

Friedrich G.J., German anatomist, pathologist, and histologist, 1809–1885. See crypts of H., under crypt, H. ampulla, H. ansa, H. glands, under gland, H. fissures, under fissure, H. layer, H. fiber layer, H. nervous layer, H. loop, H. membrane, H. fenestrated elastic membrane, H. reaction, H. sheath, H. spine, H. tubules, under tubule, H. warts, under wart, Hassall-H. bodies, under body.

henna (hen′a)
The leaves of the Egyptian privet, Lawsonia inermis; used as a cosmetic and hair dye. [Ar. h.]

Camille, Belgian otologist, 1867–1958. See H. sign.

Eduard H., German pediatrician, 1820–1910. See H. chorea, H. purpura, H.-Schönlein purpura, H.-Schönlein syndrome, Schönlein-H. syndrome.

henpuye (hen-poo′ye)
SYN: goundou. [native term on the Gold Coast (Ghana) meaning “dog-nose”]

Victor, French 20th-century biochemist. See Michaelis-Menten equation, H.-Michaelis-Menten equation.

James Paget, U. S. physiologist, *1914. See H.-Gauer response.

Joseph, U.S. physicist, 1797–1878. See Dalton-H. law.

William, British chemist, 1774–1836. See H. law.

henry (H) (hen′re)
The unit of electrical inductance, when 1 V is induced by a change in current of 1 A/sec. [Joseph H.]

K., German internist, *1907. See Krebs-H. cycle.

Victor, German anatomist and physiologist, 1835–1924. See H. canal, H. cell, H. disk, H. duct, H. knot, H. line, H. node, H. stripe.

Friedrich W., German anatomist, 1719–1745. See H. ligament.

Hepadnaviridae (he-pa′d′na-vi′ra-da)
A family of lipid-containing icosahedral DNA-containing viruses 42 mm in diameter whose genome consists of a single molecule of noncovalently closed, circular DNA that is partially single-stranded and partially double-stranded; associated with hepatitis in a number of animal species. The principal genus ortho Hepadnavirus is associated with hepatitis B in mammals and the genus Avihepadnavirus with disease in birds; persistant infection is common and is associated with chronic disease and liver cancer. [hepatitis + DNA + virus]

hepar, gen. hepatis (he′par, he′pah-tis) [TA]
SYN: liver. [L. borrowed fr. G. h., gen. hepatos, the liver] h. lobatum a fissured liver, from the scars of healed syphilitic gummas.

heparan N-sulfatase (hep′a-ran)
An enzyme that participates in the stepwise degradation of heparan sulfate; heparan N-sulfatase hydrolyzes the sulfate moiety attached to the amino group of the glucosamine residue of heparan sulfate; a deficiency of this enzyme is associated with mucopolysaccharidose IIIA (Sanfilippo syndrome A).

heparan sulfate
SYN: heparitin sulfate.

heparin (hep′a-rin)
An anticoagulant principle that is a component of various tissues (especially liver and lung) and mast cells in humans and several mammalian species; its principal and active constituent is a glycosaminoglycan composed of d-glucuronic acid and d-glucosamine, both sulfated, in 1,4-α linkage, of molecular weight 6,000–20,000. In conjunction with a serum protein cofactor (the so-called h. cofactor), h. acts as an antithrombin and an antiprothrombin. Synthetic preparations are commonly used in therapeutic anticoagulation. It also enhances activity of “clearing factors” (lipoprotein lipases). SYN: heparinic acid. h. eliminase SYN: h. lyase. h. lyase an enzyme eliminating &Udelta;-4,5-d-glucuronate residues from h. and similar 1,4-linked polyglucuronates. SYN: h. eliminase, heparinase. h. sodium a mixture of active principles (usually obtained from various tissues of domestic animals) having the properties of prolonging the clotting time of human blood.


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