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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

haemagglutination
<haematology> Agglutination of red blood cells, often used to test for the presence of antibodies directed against red cell surface antigens or carbohydrate binding proteins or viruses in a solution. Requires that the agglutinin has at least two binding sites. ... (18 Nov 1997) ...

haemagglutination inhibition
A variation of the haemagglutination technique. Some viral antigens, when coated on erythrocytes, spontaneously cause agglutination in the absence of antibody. In these situations, the specific antigen-antibody reaction actually prevents the agglutination of reagent RBCs. Haemagglutination inhibition cannot differentiate between isotypes of specifi …

haemagglutination inhibition test
<investigation> A clinical lab test used to detect the presence of a certain haemagglutinating virus or other haemagglutinin antigen based on whether the red blood cells in the sample lose the ability to clump together when the antibody to the virus or other antigen is added to it. ... If the virus or antigen is present, the antibody kills it …

haemagglutination inhibition tests
Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of haemagglutination. ... (12 Dec 1998) ...

haemagglutination test
<investigation> A test in which an antigen and an antibody react to each other on the surface of a red blood cell. ... (09 Oct 1997) ...

haemagglutination tests
Sensitive tests to measure certain antigens, antibodies, or viruses, using their ability to agglutinate certain erythrocytes. ... (12 Dec 1998) ...

haemagglutination, viral
Agglutination of erythrocytes by a virus. ... (12 Dec 1998) ...

haemagglutinin
<haematology> Substance that will bring about the agglutination of erythrocytes. ... (18 Nov 1997) ...

haemagglutinin-protease
<enzyme> Soluble haemagglutinin/protease from vibrio cholerae; a zinc metalloendopeptidase ... Registry number: EC 3.4.24.- ... Synonym: ha-protease, vibrio cholerae haemagglutinin protease, vibrio cholerae non-o1 haemagglutinin-protease, nag-ha-p ... (26 Jun 1999) ...

haemagglutinins
<haematology, immunology> Agents that cause agglutination of red blood cells. They include antibodies, blood group antigens, lectins, autoimmune factors, bacterial, viral, or parasitic blood agglutinins, etc. ... (12 Dec 1998) ...

haemagogic
Promoting a flow of blood. ... (05 Mar 2000) ...

haemagogue
1. An agent that promotes a flow of blood. ... Synonym: emmenagogue. ... Origin: hem-+ G. Agogos, leading ... (05 Mar 2000) ...

haemal
Having to do with the blood or blood vessels. ... (09 Oct 1997) ...

haemal arches
<anatomy> Three or four V-shaped bones located ventral to the bodies of the third to sixth coccygeal vertebrae; they represent intercentra and usually enclose the ventral caudal artery and vein. ... (05 Mar 2000) ...

haemal gland
Synonym for haemal node ... <anatomy> A lymphoid structure in which the blood sinuses are present in place of lymph sinuses; haemal node's occur in ruminants and some other mammals, but their presence in humans is questioned. ... Synonym: haemal gland, haemolymph gland, haemolymph node, vascular gland. ... (05 Mar 2000) ...

haemal node
<anatomy> A lymphoid structure in which the blood sinuses are present in place of lymph sinuses; haemal node's occur in ruminants and some other mammals, but their presence in humans is questioned. ... Synonym: haemal gland, haemolymph gland, haemolymph node, vascular gland. ... (05 Mar 2000) ...

haemal spine
The middle point on the underside of the haemal arch of the typical vertebra; considered by some to be represented by the sternum in humans. ... (05 Mar 2000) ...

haemalum
A solution of haematoxylin and alum used as a nuclear stain in histology, especially with eosin as a counterstain. ... (05 Mar 2000) ...

Haemamoeba
Old term for ameboid protozoa now classified in the suborder Haemosporina, blood parasites that include the genus Plasmodium. ... Origin: G. Haima, blood, + amoibe, change ... (05 Mar 2000) ...

haemamoebiasis
Any infection with ameboid forms of parasites in red blood cells, as in malaria. ... (05 Mar 2000) ...

haemanalysis
Analysis of the blood and its components. ... (09 Oct 1997) ...

haemangiectasis
Haemangiectasia ... Dilation of blood vessels. ... Origin: G. Haima, blood, + angeion, vessel, + ektasis, a stretching ... (05 Mar 2000) ...

haemangiectatic hypertrophy
Synonym for Klippel-Trenaunay-Weber syndrome ... <syndrome> A congenital malformation syndrome characterised by the triad of asymmetric limb hypertrophy, haemangiomata, and nevi. Asymmetric limb hypertrophy is enlargement of one limb and not the corresponding limb on the other side, the enlarged limb being 3 times more likely to be a leg than …

haemangio-
The blood vessels. ... Origin: G. Haima, blood, + angeion, vessel ... (05 Mar 2000) ...

haemangioblast
<haematology> Earliest mesodermal precursor of both blood and vascular endothelial cells. Described in embryonic yolk sac blood islands of birds. ... (18 Nov 1997) ...

haemangioblastoma
<oncology, tumour> A haemangioma, or type of tumour composed of blood vessel or angioblast cells, which occurs in the brain. ... (09 Oct 1997) ...

haemangioendothelioblastoma
<oncology, tumour> A tumour which is formed from endothelial cells and which tends to line the inside surfaces of blood vessels. It arises in embryonic connective tissue (the mesenchyme). ... (09 Oct 1997) ...

haemangioendothelioma
<oncology, tumour> A tumour which comes from endothelial cells lining the inside surfaces of blood vessels. ... (09 Oct 1997) ...

haemangioendothelioma, epithelioid
A tumour of medium-to-large veins, composed of plump-to-spindled endothelial cells that bulge into vascular spaces in a tombstone-like fashion. These tumours are thought to have 'borderline' aggression, where one-third develop local recurrences, but only rarely metastasize. It is unclear whether the epithelioid haemangioendothelioma is truly neopla …

haemangiofibroma
A haemangioma with an abundant fibrous tissue framework. ... (05 Mar 2000) ...

haemangioma
<cardiology, dermatology, embryology, physiology> A haemangioma or arteriovenous malformation is a tangle of abnormal vessels that forms an abnormal communication between the arterial and venous systems. ... most are congenital and result from improperly formed angioblastic tissue in the foetus. If large enough, they may produce a shunt of suf …

haemangioma of bone
<radiology> Lytic bone lesion, can cross joint spaces and interosseous membranes Findings: vertebral body: vertical striations (ivory), skull: sunburst or sunrise, long bone: soap bubble or honeycomb, which may surround a joint see also: Mafucci syndrome ... (12 Dec 1998) ...

haemangioma of vertebrae
<radiology> Cavernous type commonly found, 10% in autopsy series with the vast majority being small, asymptomatic and unable to be seen on plain films, most often in lumbar region and singular, complications: compression fractures (occasionally with cord compression), chronic haemorrhage to blockage of spinal canal X-ray: slight loss of densi …

haemangioma planum extensum
A benign, flat, cutaneous haemangioma of considerable size. ... (05 Mar 2000) ...

haemangioma, cavernous
A vascular tumour preponderantly composed of large dilated blood vessels, often containing large amounts of blood, occurring in the skin, subcutaneously, or both, and also in many viscera, particularly the liver, spleen, pancreas, and sometimes the brain. The typical superficial lesions are bright to dark red in colour; deep lesions have a blue col …

haemangiomatosis
A condition in which there are numerous haemangiomas. ... (05 Mar 2000) ...

haemangiopericytoma
<oncology, tumour> A type of tumour thought to be formed from connective tissue cells and originating from capillaries. ... (09 Oct 1997) ...

haemangiosarcoma
A rare malignant neoplasm characterised by rapidly proliferating, extensively infiltrating, anaplastic cells derived from blood vessels and lining irregular blood-filled or lumpy spaces. ... (12 Dec 1998) ...

haemapheic
Pertaining to or containing haemaphein. ... (05 Mar 2000) ...

haemaphein
A brown pathologic pigment derived from haemoglobin; said to be a combination of indican and urobilin. ... Origin: G. Haima, blood, + phaios, dusky ... (05 Mar 2000) ...

haemapheism
The presence of haemaphein in the blood plasma and urine. ... (05 Mar 2000) ...

Haemaphysalis
A genus of small, eyeless, inornate ticks. As larvae and nymphs, they are found chiefly on small mammals and birds; as adults, they are found on larger mammals and some birds. They are important as vectors of protozoa and viruses, (e.g., Kyasanur Forest disease virus). ... Origin: G. Haima, blood, + physaleos, full of wind ... (05 Mar 2000) ...

Haemaphysalis chordeilis
The bird tick, a common tick of turkeys and upland game birds in North America. ... (05 Mar 2000) ...

Haemaphysalis cinnabarina
A tick that occurs chiefly in the dry district of British Columbia; this species can cause ascending paraplegia or tick paralysis in both humans and animals. ... Origin: G. Kinnabarinos, like cinnabar, vermilion ... (05 Mar 2000) ...

Haemaphysalis cinnabarina punctata
A race of Haemaphysalis in Europe, north Africa, and Japan; larvae and nymphs feed on terrestrial reptiles, and adults on various domestic herbivores, rabbits, and hedgehogs; it transmits bovine babesiosis and anaplasmosis. ... (05 Mar 2000) ...

Haemaphysalis concinna
Common rodent tick species of the area formerly known as the U.S.S.R. That is a vector and reservoir of tick typhus. ... (05 Mar 2000) ...

Haemaphysalis leachi
A species of Africa, Asia, and Australia that occurs on domestic and wild carnivores, on small rodents, and occasionally on cattle; it transmits canine babesiosis and boutonneuse fever. ... (05 Mar 2000) ...

Haemaphysalis leporis-palustris
The rabbit tick, a tick species that occurs on all species of rabbits and on many wild birds in all parts of North America from Alaska to Mexico, and is important in the spread of Rocky Mountain spotted fever and tularaemia among rabbits; it does not attack humans or most domestic animals and does not spread these diseases to them, but serves to ma …

Haemaphysalis spinigera
A tropical forest species in India that is a vector of Kyasanur Forest disease; various rodents and insectivores serve as hosts of immature ticks of this species, which carry an arbovirus of the Russian spring-summer B group complex; monkeys act as reservoirs of human infection. ... (05 Mar 2000) ...

haemarthron
Synonym for haemarthrosis ... <orthopaedics, rheumatology> Blood within a joint space. Commonly seen after trauma to a joint. ... May occur spontaneously in those with a blood clotting disorder (haemophilia) or those who are receiving anticoagulant medications. ... (27 Sep 1997) ...

haemarthrosis
<orthopaedics, rheumatology> Blood within a joint space. Commonly seen after trauma to a joint. ... May occur spontaneously in those with a blood clotting disorder (haemophilia) or those who are receiving anticoagulant medications. ... (27 Sep 1997) ...

haemastrontium
A stain made by adding strontium chloride to a solution of haematein and aluminum chloride in citric acid and alcohol; used in histology. ... (05 Mar 2000) ...

haemat-
Blood. ... See: hem-, haemato-, haemo-. ... Origin: G. Haima (haimat-) ... (05 Mar 2000) ...

haematapostema
An abscess into which blood has effused. ... Origin: haemat-+ G. Apostema, abscess ... (05 Mar 2000) ...

haematein
An oxidation product of haematoxylin. ... (05 Mar 2000) ...

haematemesis
<symptom> The vomiting of blood. ... Origin: Gr. Emesis = vomiting ... (18 Nov 1997) ...

haematencephalon
Synonym: cerebral haemorrhage. ... Origin: haemat-+ G. Enkephalos, brain ... (05 Mar 2000) ...

haematherapy
Synonym for haemotherapy ... Haemotherapeutics ... Treatment of disease by the use of blood or blood derivatives, as in transfusion. ... Synonym: haematherapy. ... (05 Mar 2000) ...

haematherm
Synonym: homeotherm. ... Origin: G. Haima, blood, + thermos, warm ... (05 Mar 2000) ...

haemathermal
Synonym: homeothermic. ... Origin: G. Haima, blood, + thermos, warm ... (05 Mar 2000) ...

haemathermous
Synonym for homeothermic ... Pertaining to, or having the essential characteristic of, homeotherms. ... Compare: poikilothermic, heterothermic. ... Synonym: haemathermal, haemathermous, haematothermal, homeothermal, homoiothermal, homothermal, warm-blooded. ... (05 Mar 2000) ...

haemathidrosis
Synonym for haematidrosis ... <dermatology, haematology> A very rare disorder in which the patient sweats blood and/or blood pigments. ... (09 Oct 1997) ...

haemathorax
Synonym for haemothorax ... <chest medicine> A collection of blood in the thorax. Generally one-sided and secondary to chest trauma. One side of the chest can hold 2-3 litres of blood in the average adult. ... Symptoms include chest pain, shortness of breath, rapid heartbeat and restlessness. Treatment requires chest tube thoracostomy. Open sur …

haematid
1. A red blood cell. ... 2. Obsolete term for a cutaneous eruption presumed to be caused by a substance in the circulating blood. ... Origin: haemat-+ -id ... (05 Mar 2000) ...

haematidrosis
<dermatology, haematology> A very rare disorder in which the patient sweats blood and/or blood pigments. ... (09 Oct 1997) ...

haematimeter
Synonym for haemocytometer ... haemacytometer ...

haematin chloride
Synonym for hemin ... <physiology> A substance, in the form of reddish brown, microscopic, prismatic crystals, formed from dried blood by the action of strong acetic acid and common salt; called also Teichmann's crystals. Chemically, it is a hydrochloride of haematin. ... The obtaining of these small crystals, from old blood clots or suspected …

haematinaemia
The presence of haem in the circulating blood. ... Origin: haematin + G. Haima, blood ... (05 Mar 2000) ...

haematinic
1. Improving the condition of the blood. ... 2. An agent that improves the quality of blood by increasing the number of erythrocytes and/or the haemoglobin concentration. ... Synonym: haematic. ... Synonym: haematonic. ... (05 Mar 2000) ...

haematinic principle
The principle previously thought to be produced by the action of Castle's intrinsic factor upon an extrinsic factor in food, now recognised as vitamin B12. ... (05 Mar 2000) ...

haematinics
Agents which improve the quality of the blood, increasing the haemoglobin level and the number of erythrocytes. They are used in the treatment of anaemias. ... (12 Dec 1998) ...

haemato-
Synonym for haemo- ... <prefix> Combining forms indicating relation or resemblance to blood, association with blood; as, haemapod, haematogenesis, haemoscope. ... Words from Gr. Are written haema-, haemato-, hemo-, as well as haema-, haemato-, haemo-. ... Origin: Gr. Ai^'ma, blood. ... (29 Oct 1998) ...

Haematobia
Genus of flies of the family Muscidae. ... (05 Mar 2000) ...

Haematobia irritans
Synonym for horn fly ... A major pest of cattle in the Northern Hemisphere that transmits the filarial parasite Stephanofilaria stilesi. ... Synonym: Haematobia irritans. ... (05 Mar 2000) ...

haematobilia
Synonym for haemobilia ... Haemorrhage in or through the biliary tract. The blood may drain into the intestine or form clots within the biliary tract. The causes include trauma, inflammation, cholelithiasis, vascular disease, or neoplasms. ... (12 Dec 1998) ...

haematobium
Any microorganism that is parasitic in the blood, especially an animal form or haemozoon. ... Origin: haemato-+ G. Bios, life ... (05 Mar 2000) ...

haematoblast
<haematology> A stem cell which is located within haemopoietic tissue (such as bone marrow), a tissue which produces blood. ... (09 Oct 1997) ...

haematocele
An effusion of blood into a cavity, especially into the tunica vaginalis testis. ... (12 Dec 1998) ...

haematocephaly
Intracranial effusion of blood, commonly in a foetus. ... Origin: haemato-+ G. Kephale, head ... (05 Mar 2000) ...

haematochezia
<clinical sign, gastroenterology> The passage of bright red blood per rectum. ... This symptom may be associated with haemorrhoids, anal fissure, rectal polyp, cancer, diverticulitis or inflammatory bowel disease. ... (18 Nov 1997) ...

haematochlorin
A green colouring matter derived from haemoglobin obtained from the placenta. ... Origin: haemato-+ G. Chloros, light green + -in ... (05 Mar 2000) ...

haematochrome
<plant biology> A red pigment which appears in green algae when a bright light is shone on the algae. ... (09 Oct 1997) ...

haematochyluria
Presence of blood as well as chyle in the urine. ... Origin: haemato-+ G. Chylos, juice, + ouron, urine ... (05 Mar 2000) ...

haematocolpometra
Accumulation of blood in the uterus and vagina resulting from an imperforate hymen or other lower vaginal obstruction. ... Origin: haemato-+ G. Kolpos, vagina, + metra, womb. ... (05 Mar 2000) ...

haematocolpos
An accumulation of menstrual blood in the vagina. ... (12 Dec 1998) ...

haematocrit
<haematology, investigation> Relative volume of blood occupied by erythrocytes. An average figure for humans is 45ml per cent, i.e. A packed red cell volume of 45ml in 100ml of blood. ... (18 Nov 1997) ...

haematocyst
Synonym for haemorrhagic cyst ... A cyst containing blood or resulting from the encapsulation of a haematoma. ... Synonym: blood cyst, haematocele, haematocyst, sanguineous cyst. ... (05 Mar 2000) ...

haematocystis
An effusion of blood into the bladder. ... Origin: haemato-+ G. Kystis, bladder ... (05 Mar 2000) ...

haematocyte
<haematology> A red blood cell. ... (22 Aug 1998) ...

haematocytoblast
Synonym for haemocytoblast ... A blood cell derived from embryonic mesenchyme, characterised by basophilic cytoplasm and a relatively large nucleus with a spongy, loose network of chromatin and several nucleoli; mitochondria are extremely fine and delicate. Haemocytoblasts represent the primitive stem cells of the monophyletic theory of the origin o …

haematocytolysis
Synonym for haemocytolysis ... <haematology> Haemocytolysis is the process of dissolving blood cells. ... Origin: Gr. Lysis = dissolution ... (09 Oct 1997) ...

haematocytometer
Synonym for haemocytometer ... haemacytometer ...

haematocytozoon
Synonym for haemocytozoon ... A protozoon parasite of the blood cells. ... Synonym: haemacytozoon, haematocytozoon. ... Origin: haemo-+ G. Kytos, cell, + zoon, animal ... (05 Mar 2000) ...

haematodyscrasia
Synonym for haemodyscrasia ... Any abnormal condition or disorder of the blood and haemopoietic tissue, used especially with reference to those resulting in changes in the formed elements. ... Synonym: haematodyscrasia. ... Origin: haemo-+ G. Dyscrasia, bad temperament ... (05 Mar 2000) ...

haematodystrophy
Synonym for haemodystrophy ... Any disease or abnormal condition of the blood and haemopoietic tissues, exclusive of simple transitory changes. ... Synonym: haematodystrophy. ... (05 Mar 2000) ...

haematogenetic calculus
Synonym for serumal calculus ... A greenish or dark brown calcareous deposit on the tooth, usually apical to the gingival margin. ... Synonym: haematogenetic calculus. ... Synonym: subgingival calculus. ... (05 Mar 2000) ...

haematogenic
<haematology> Originating from blood. Also used as a synonym of haemopoietic. ... Origin: Gr. Gennan = to produce ... (09 Oct 1997) ...

haematogenous abscess
An abscess caused by blood-borne organisms. ... (05 Mar 2000) ...

haematogenous embolism
Embolism occurring in a blood vessel. ... (05 Mar 2000) ...

haematogenous jaundice
Synonym for haemolytic jaundice ... <haematology> Haemolytic jaundice is a type of jaundice, where the skin takes on a yellowish hue, which occurs when red blood cells have been destroyed (by haemolysis). ... (09 Oct 1997) ...