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mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197
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Hagedorn, Werner<person> German surgeon, 1831-1894. ... See: Hagedorn needle. ... (05 Mar 2000) ...
HagemanSurname of person in whom deficiency of Hageman factor (q.v., ) was first observed. ... (05 Mar 2000) ...
Hageman factorSynonym for factor xii ... <chemical> Stable blood coagulation factor activated by contact with the subendothelial surface of an injured vessel. Along with prekallikrein, it serves as the contact factor that initiates the intrinsic pathway of blood coagulation. Kallikrein activates factor xii to xiia. Deficiency of factor xii, also called the …
Hageman factor assayA test used to measure the activity of a blood clotting factor XII. This test may be used to evaluate excessive bleeding. Low factor XII may be seen in cases of congenital deficiency of factor XII, heparin administration and liver disease. ... (27 Sep 1997) ...
hageman factor deficiencyA deficiency of a specific blood clotting factor (XII) that may be genetic or acquired. Administration of heparin or severe liver disease may result in factor XII (Hageman factor) deficiency. There are usually no symptoms associated with this deficiency, but there may be symptoms of mild blood loss in some cases. Treatment is generally unnecessary. …
Hagemann factor<haematology> Plasma _ globulin (110 kD), blood clotting factor XII, which is activated by contact with surfaces to form Factor XIIa, that in turn activates factor XI. Factor XIIa also generates plasmin from plasminogen and kallikrein from prekallikrein. Both plasmin and kallikrein activate the complement cascade. Hagemann factor is important …
haggard1. Wild or intractable; disposed to break away from duty; untamed; as, a haggard or refractory hawk. ... 2. [For hagged, fr. Hag a witch, influenced by haggard wild] Having the expression of one wasted by want or suffering; hollow-eyed; having the features distorted or wasted, or anxious in appearance; as, haggard features, eyes. 'Staring his eyes, …
haggisA Scotch pudding made of the heart, liver, lights, etc, of a sheep or lamb, minced with suet, onions, oatmeal, etc, highly seasoned, and boiled in the stomach of the same animal; minced head and pluck. ... Alternative forms: haggiss, haggess, and haggies. ... Origin: Scot. Hag to hack, chop, E. Hack. Formed, perhaps, in imitation of the F. Hachis (E. …
haggleTo be difficult in bargaining; to stick at small matters; to chaffer; to higgle. 'Royalty and science never haggled about the value of blood.' (Walpole) ... To cut roughly or hack; to cut into small pieces; to notch or cut in an unskillful manner; to make rough or mangle by cutting; as, a boy haggles a stick of wood. 'Suffolk first died, and York, a …
hagiotherapyTreatment of the sick by contact with relics of the saints, visits to shrines, and other religious observances. ... Origin: G. Hagios, sacred ... (05 Mar 2000) ...
Haglund, S<person> Patrick, Swedish orthopedist, 1870-1937. ... See: Haglund's deformity, Haglund's disease. ... (05 Mar 2000) ...
Haglund's deformitySynonym for Haglund's disease ... An abnormal prominence of the posterior superior lateral aspect of the os calcis, caused by a gait disorder. ... Synonym: Haglund's deformity. ... (05 Mar 2000) ...
Haglund's diseaseAn abnormal prominence of the posterior superior lateral aspect of the os calcis, caused by a gait disorder. ... Synonym: Haglund's deformity. ... (05 Mar 2000) ...
Hahn's oxine reagentAn alcoholic solution of 8-hydroxyquinoline used in the determination of zinc, aluminum, magnesium, etc. ... (05 Mar 2000) ...
hahnemannianRelating to homeopathy as taught by Hahnemann. ... (05 Mar 2000) ...
hahniumName proposed for the artificially made element 105. ... Origin: Otto Hahn, Ger. Physical chemist and Nobel laureate, 1879-1968 ... (05 Mar 2000) ...
Haidinger, Wilhelm von<person> Austrian mineralogist, 1795-1871. ... See: Haidinger's brushes. ... (05 Mar 2000) ...
Haidinger's brushesThe perception of two dark yellowish brushes or sheaves radiating about 5 degrees from the point of fixation when an evenly illuminated surface, such as the blue sky, is viewed through a polarising lens. ... (05 Mar 2000) ...
Hailey-Hailey diseaseSynonym for benign familial chronic pemphigus ... Recurrent eruption of vesicles and bullae that become scaling and crusted lesions with vesicular borders, predominantly of the neck, groin, and axillary regions; autosomal dominant inheritance, presenting in late adolescence or early adult life. ... Synonym: Hailey-Hailey disease. ... (05 Mar 2000) ...
Hailey, Hugh<person> U.S. Dermatologist, *1909. ... See: Hailey-Hailey disease. ... (05 Mar 2000) ...
Hailey, W Howard<person> U.S. Dermatologist, 1898-1967. ... See: Hailey-Hailey disease. ... (05 Mar 2000) ...
hair1. The collection or mass of filaments growing from the skin of an animal, and forming a covering for a part of the head or for any part or the whole of the body. ... 2. One the above-mentioned filaments, consisting, in invertebrate animals, of a long, tubular part which is free and flexible, and a bulbous root imbedded in the skin. 'Then read he me …
hair ballSynonym for trichobezoar ... A hair cast in the stomach or intestinal tract, common in cats. ... Synonym: hair ball, pilobezoar. ... Origin: tricho-+ bezoar ... (05 Mar 2000) ...
hair bulbSynonym for bulb of hair ... Hair bulb, the lower expanded extremity of the hair follicle that fits like a cap over the papilla pili. ... Synonym: bulbus pili, hair bulb. ... (05 Mar 2000) ...
hair cast1. A cast composed of parakeratotic scales attached to scalp hair but freely movable up and down the hair shaft; found in scaling dermatitis of the scalp, including dandruff, psoriasis, and seborrheic dermatitis. ... Synonym: pseudonit. ... 2. A small, nodular accretion of epithelial cells and keratinous debris resulting from failure of the internal …
hair cell1. <biology> Cells found in the epithelial lining of the labyrinth of the inner ear. The hairs are stereovilli up to 25 m long that restrict the plane in which deformation of the apical membrane of the cell can be brought about by movement of fluid or by sound. Movement of the single stereocilium transduces mechanical movements into electrica …
hair cells, innerBulbous cells that are medially placed in one row in the organ of corti. In contrast to the outer hair cells, the inner hair cells are fewer in number, have fewer sensory hairs, and are less differentiated. ... (12 Dec 1998) ...
hair cells, outerMechanoreceptors in the organ of corti. In mammals the outer hair cells are arranged in three rows which are further from the modiolus than the single row of inner hair cells. The motile properties of the outer hair cells may contribute actively to tuning the sensitivity and frequency selectivity of the cochlea. ... (12 Dec 1998) ...
hair colourColour of hair or fur. ... (12 Dec 1998) ...
hair crossesSynonym for cruces pilorum ... Crosslike figures formed by hairs growing from two directions that meet and then separate in a direction perpendicular to the original orientation. ... Synonym: hair crosses. ... (05 Mar 2000) ...
hair cycleThe cyclical phases of growth (anagen), regression (catagen), and quiescence (telogen) in the life of a hair. ... (05 Mar 2000) ...
hair diseasesDiseases affecting the orderly growth and persistence of hair. ... (12 Dec 1998) ...
hair diskA richly innervated area of skin around a hair follicle, consisting of a thickened layer of epithelial cells in which ramify unmyelinated terminals of a single axon. ... (05 Mar 2000) ...
hair dyesDyes used as cosmetics to change hair colour either permanently or temporarily. ... (12 Dec 1998) ...
hair follicle<dermatology> A tube-like opening in the epidermis where the hair shaft develops and into which the sebaceous glands open ... (13 Nov 1997) ...
hair lossHair loss may be associated with aging, hormones (androgens) or genetic predisposition. The pattern of baldness in women is different from that of men. In women there is thinning of the hair all over the scalp, but the frontal hairline is maintained. The hair loss is usually permanent. Treatment has been successful with topical minoxidil in some ca …
hair papillaSynonym: papilla pili. ... (05 Mar 2000) ...
hair preparationsHair grooming and cleansing aids or other products meant for topical application to hair, usually human. They include sprays, bleaches, conditioners, rinses, shampoos, nutrient lotions, etc. ... (12 Dec 1998) ...
hair rootThe part of a hair that is embedded in the hair follicle, its lower succulent extremity capping the dermal papilla pili in the deep bulbous portion of the follicle. ... Synonym: radix pili. ... (05 Mar 2000) ...
hair shaftThe non-growing portion of a hair which protrudes from the skin, i.e., from the follicle. ... Synonym: scapus pili. ... (05 Mar 2000) ...
hair streamsThe curved lines along which the hairs are arranged on the head and various parts of the body, especially noticeable in the foetus. ... Synonym: flumina pilorum. ... (05 Mar 2000) ...
hair transplantAutografts of punch biopsies of hair-bearing skin, such as occipital scalp, onto frontal scalp in male pattern alopecia. ... (05 Mar 2000) ...
hair whorlsA spiral arrangement of the hairs, as at the crown of the head. ... Synonym: vortices pilorum. ... (05 Mar 2000) ...
hairline fractureA fracture without separation of the fragments, the line of break being hairlike, as seen sometimes in the skull. ... Synonym: capillary fracture. ... (05 Mar 2000) ...
hairpinThe structure formed by a polynucleic acid by base-pairing between neighboring complementary sequences of a single strand of either DNA or RNA. ... (05 Mar 2000) ...
hairpin loopAn area where single-stranded DNA or RNA has folded back on itself and nucleotides from the two separate segments have base paired, so that the resulting structure appears as the name describes. ... (09 Oct 1997) ...
hairpin loopsSingle-stranded DNA and RNA can fold back on itself under the proper conditions forming irregular double-helical loops. ... (05 Mar 2000) ...
hairyA pair rule gene of Drosophila. ... (18 Nov 1997) ...
hairy cell leukaemia<haematology, oncology> A rare chronic disorder characterised by proliferation of hairy cells in reticuloendothelial organs and blood. ... Origin: Gr. Haima = blood ... (13 Nov 1997) ...
hairy cellsMedium sized leukocytes that have features of reticuloendothelial cell's and multiple cytoplasmic projections (hairs) on the cell surface, but which may be a variety of B lymphocyte; they are found in hairy cell leukaemia. ... (05 Mar 2000) ...
hairy heartSynonym for fibrinous pericarditis ... Acute pericarditis with fibrinous exudate. ... See: bread-and-butter pericardium. ... Synonym: hairy heart, pericarditis villosa, shaggy pericardium. ... (05 Mar 2000) ...
hairy leukoplakia<dermatology, gastroenterology> A white lesion appearing on the tongue, occasionally on the buccal mucosa, of patients with AIDS, the lesion appears raised, with a corrugated or hairy surface due to keratin projections. ... (13 Nov 1997) ...
hairy moleSynonym for nevus pilosus ... A mole covered with an abundant growth of hair. ... Synonym: hairy mole. ... (05 Mar 2000) ...
hairy root cultureA relatively new type of plant culture, which consists of highly branched roots of a plant, covered with a mass of tiny root hairs. These cultures do not require hormones or vitamins to grow, so they can grow on simple media of salts and sugars. Just as importantly, they produce secondary metabolites at levels similar to those made in the original …
hairy shaker diseaseSynonym for border disease ... Congenital disorder of lambs caused by a virus closely related to or identical with certain strains of bovine viral diarrhoea virus. ... (12 Dec 1998) ...
hairy tongueA tongue with abnormal elongation of the filiform papillae, resulting in a thickened furry appearance. ... Synonym: glossotrichia, trichoglossia. ... (05 Mar 2000) ...
haitiA republic in the greater antilles in the west indies. Its capital is port-au-prince. With the dominican republic it forms the island of hispaniola - haiti occupying the western third and the dominican republic, the eastern two thirds. Haiti belonged to france from 1697 until its rule was challenged by slave insurrections from 1791. It became a rep …
hake<zoology> One of several species of marine gadoid fishes, of the genera Phycis, Merlucius, and allies. The common European hake is M. Vulgaris; the American silver hake or whiting is M. Bilinearis. Two American species (Phycis chuss and P. Tenius) are important food fishes, and are also valued for their oil and sounds. ... Synonym: squirrel ha …
halation1. <optics> Blurring of the visual image by glare. ... 2. <photography> An appearance as of a halo of light, surround the edges of dark object in a photographic picture. ... (21 Jun 2000) ...
halazepam<drug> A benzodiazepine used in the management of anxiety disorders and for short-term relief of symptoms of anxiety. ... Chemical name: 7-Chloro-1,3-dihydro-5-phenyl-1-(2,2,2-trifluoroethyl)-2H-1,4-benzodiazepin-2-one ... (21 Jun 2000) ...
halazone<drug> A chloramine used for the sterilization of drinking water. ... Chemical name: N,N-(N,N-Dichlorosulfamyl)benzoic acid ... (21 Jun 2000) ...
Halbeisen, William<person> U.S. Physician, *1915. ... See: Stryker-Halbeisen syndrome. ... (05 Mar 2000) ...
Halberstaedter-Prowazek bodiesSynonym for trachoma bodies ... Distinctive, complex, intracytoplasmic forms found in the conjunctival epithelial cells of persons in the acute phase of trachoma, less frequently in later stages, varying from 1) discrete acidophilic granules (approximately 250 nm in diameter), to 2) irregular clumps of such material embedded in a basophilic matrix, …
Halberstaedter, Ludwig<person> German physician, 1876-1949. ... See: Halberstaedter-Prowazek bodies. ... (05 Mar 2000) ...
halcinonide<chemical> 21-chloro-9-fluoro-11-hydroxy-16,17-((1-methylethylidene)bis(oxy)pregn-4-ene-3,20-dione. A topical glucocorticoid used in the treatment of dermatitis, eczema, or psoriasis. It may cause skin irritation. ... Pharmacological action: glucocorticoids, topical. ... Chemical name: Pregn-4-ene-3,20-dione, 21-chloro-9-fluoro-11-hydroxy-16,17 …
halcyon<ornithology> A kingfisher. By modern ornithologists restricted to a genus including a limited number of species having omnivorous habits, as the sacred kingfisher (Halcyon sancta) of Australia. 'Amidst our arms as quiet you shall be As halcyons brooding on a winter sea.' (Dryden) ... Origin: L. Halcyon, alcyon, Gr., F. Halcyon. ... Source: Web …
Haldane chamberAn obsolete chamber for metabolic studies on animals. ... (05 Mar 2000) ...
Haldane effectThe promotion of carbon dioxide dissociation by oxygenation of haemoglobin. ... (05 Mar 2000) ...
Haldane relationship<biochemistry> A mathematical relationship between the equilibrium constant of an enzyme-catalyzed reaction and all of that enzyme's kinetic parameters (e.g., Vmax and Km's). ... (05 Mar 2000) ...
Haldane transformationThe multiplication of inspired oxygen concentration by the ratio of expired to inspired nitrogen concentrations in the calculation of oxygen consumption or respiratory quotient by the open circuit method. ... (05 Mar 2000) ...
Haldane tubeA tube for securing human alveolar air samples; consisting of a narrow hosepipe with a mouthpiece from which a tube is attached for the withdrawal of expired air at the end of a sudden, maximal expiration. ... (05 Mar 2000) ...
Haldane-Priestley sample<physiology> An approximation of alveolar gas obtained from the end of a sudden maximal expiration into a Haldane tube. ... (05 Mar 2000) ...
Haldane, John B S<person> English biochemist and geneticist, who wrote many works of popular science. ... Lived: 1892-1964. ... See: Haldane relationship. ... (05 Mar 2000) ...
Haldane, John S<person> Scottish physiologist at Oxford. ... Lived: 1860-1936. ... See: Haldane's apparatus, Haldane chamber, Haldane effect, Haldane transformation, Haldane tube, Haldane-Priestley sample. ... (05 Mar 2000) ...
Haldane's apparatus<apparatus, chest medicine> A device used for the analysis of respiratory gases. ... (05 Mar 2000) ...
Haldane's evolutionary unit<unit> A unit of measurement, given in darwins, which measures the increase in body size of a chronospecies over evolutionary time. ... (13 Nov 1997) ...
Haldane's rule<genetics> if one of the two sexes is missing, sterile, or rare in a population of first-generation hybrids between two different species, then that sex is the heterogametic sex (has two different sex chromosomes, such as XY as opposed to XX). ... (09 Oct 1997) ...
Hale's colloidal iron stain<technique> A stain used to distinguish acid mucopolysaccharides such as hyaluronic acid; may be combined with PAS to also visualise carbohydrate-containing proteins and glycoproteins. ... (05 Mar 2000) ...
Hales, Stephen<person> English physiologist, 1677-1761. ... See: Hales' piesimeter. ... (05 Mar 2000) ...
Hales' piesimeterA glass tube inserted into an artery at right angles to its axis, the pressure being shown by the height to which the blood ascends in the tube. ... (05 Mar 2000) ...
halethazole5-Chloro-2-[p-(diethylaminoethoxy)phenyl]benzothiazole;an antiseptic with antifungal properties. ... (05 Mar 2000) ...
halfIn an equal part or degree; in some pa appromating a half; partially; imperfectly; as, half-coloured, half done, half-hearted, half persuaded, half conscious. 'Half loth and half consenting.' 'Their children spoke halfin the speech of Ashdod.' (Neh. Xiii. 24) ... 1. Consisting of a moiety, or half; as, a half bushel; a half hour; a half dollar; a ha …
half amplitude pulse durationThe time, in milliseconds, required for a wave form to reach half of its full magnitude. ... (05 Mar 2000) ...
half and half nailDivision of the nail by a transverse line into a proximal dull white part and a distal pink or brown part; seen in uraemia. ... (05 Mar 2000) ...
half axial viewSynonym for Towne projection ... Reverse tilted AP radiographic projection devised to permit demonstration of the entire occipital bone, foramen magnum, and dorsum sellae, as well as the petrous ridges. ... Synonym: half axial view, half-axial projection, Towne view. ... (05 Mar 2000) ...
half blood1. The relation between persons born of the same father or of the same mother, but not of both; as, a brother or sister of the half blood. See Blood, 2 and 4. ... 2. A person so related to another. ... 3. A person whose father and mother are of different races; a half-breed. ... In the 2d and 3d senses usually with a hyphen. ... Source: Websters Dictio …
half cystineRefers to one-half of a cystine molecule or of a cystinyl residue in a protein or peptide. ... (05 Mar 2000) ...
half register<molecular biology> A misalignment between two identical sets of repeating units of nucleotides within two copies of the same chromosome (one set of repeating units per copy of the chromosome), where repeating unit A from one set is inappropriately aligned with repeating unit B on the other set, so that ABABAB on one set would be aligned with …
half-a-gram stain<technique> A lab technique used to detect the presence of members from the bacterial family Legionellaceae in samples of sputum. ... (09 Oct 1997) ...
half-axial projectionSynonym for Towne projection ... Reverse tilted AP radiographic projection devised to permit demonstration of the entire occipital bone, foramen magnum, and dorsum sellae, as well as the petrous ridges. ... Synonym: half axial view, half-axial projection, Towne view. ... (05 Mar 2000) ...
half-chair formSee: Haworth conformational formulas of cyclic sugars. ... (05 Mar 2000) ...
half-glass spectaclesSpectacles, used for reading, in which the upper portion of the lenses are removed. ... Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. ... (05 Mar 2000) ...
half-haptenA substance that elicits an antigen-antibody reaction, but no precipitation. ... (05 Mar 2000) ...
half-inferior<plant biology> Of an ovary, partly below and partly above the level of attachment of the perianth and stamens. ... (13 Nov 1997) ...
half-life1. <pharmacology> The period over which the concentration of a specified chemical or drug takes to fall to half its original concentration in the specified fluid or blood. ... 2. <radiobiology> The time required to reduce the amount of a radionuclide to one-half the amount originally present. Physical or radioactive half-life refers to r …
half-moon1. The moon at the quarters, when half its disk appears illuminated. ... 2. The shape of a half-moon; a crescent. 'See how in warlike muster they appear, In rhombs, and wedges, and half-moons, and wings.' (Milton) ... 3. An outwork composed of two faces, forming a salient angle whose gorge resembles a half-moon; now called a ravelin. ... 4. <zoolog …
half-reactions<chemistry> The two parts of an oxidation-reduction reaction, one representing oxidation, the other reduction. ... (09 Jan 1998) ...
half-tetrad analysis<genetics> The analysis of tetrad chromosomes (a pair of homologous chromosomes, thus four total chromosomes) after recombination when only half of the tetrad (two of the four chromosomes) can be analysed. ... (13 Nov 1997) ...
half-timeThe time, in a first-order chemical (or enzymic) reaction, for half of the substance (substrate) to be converted or to disappear. ... Compare: half-life. ... (05 Mar 2000) ...
half-value layer<radiobiology> The thickness of a specified material (usually a specific absorber), which attenuates a beam of radiation so that the exposure rate or absorbed dose rate at a specified point is reduced by half. ... (20 Sep 2002) ...
