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

Hanes plot
A graphical representation of enzyme kinetic data in which the substrate concentration divided by the velocity (i.e., the [S]/v ratio) is plotted on the vertical axis as a function of [S]. Sometimes referred to as the Hanes-Wilkinson plot. ... (05 Mar 2000) ...

hanger
1. One who hangs, or causes to be hanged; a hangman. ... 2. That by which a thing is suspended. Especially: A strap hung to the girdle, by which a dagger or sword is suspended. ... <machinery> A part that suspends a journal box in which shafting runs. ... A bridle iron. ... 3. That which hangs or is suspended, as a sword worn at the side; especia …

hanging
1. Requiring, deserving, or foreboding death by the halter. 'What a hanging face!' ... 2. Suspended from above; pendent; as, hanging shelves. ... 3. Adapted for sustaining a hanging object; as, the hanging post of a gate, the post which holds the hinges. Hanging compass, a compass suspended so that the card may be read from beneath. Hanging garden, a …

hanging drop
A drop of liquid on the undersurface of the object glass for examination under the microscope. ... (05 Mar 2000) ...

hanging drop slide
<microscopy> A glass slide with a concavity or a built-up chamber which allows a drop of culture to be placed on a cover- slip inverted over the cell. It makes possible the examination of freely moving protozoa, etc., confined only by the limits of the drop and the bottom surface of the coverslip. ... (05 Aug 1998) ...

hanging septum
The deformity caused by an abnormal width of the septal portion of the alar cartilages. ... (05 Mar 2000) ...

hanging-block culture
The propagation of microorganisms on a cube of solidified agar medium which is inoculated, attached to a cover glass, and inverted over a moist chamber or hollowed slide. ... (05 Mar 2000) ...

hangman's fracture
<radiology> Bilateral fracture of pedicles of axis (C2) see also: axis fractures, cervical spine fractures ... (12 Dec 1998) ...

Hanhart, Ernst
<person> Swiss internist, 1891-1973. ... See: Hanhart's syndrome. ... (05 Mar 2000) ...

Hanhart's syndrome
micrognathia with peromelia ...

hank
1. A parcel consisting of two or more skeins of yarn or thread tied together. ... 2. A rope or withe for fastening a gate. ... 3. Hold; influence. 'When the devil hath got such a hank over him.' (Bp. Sanderson) ... 4. A ring or eye of rope, wood, or iron, attached to the edge of a sail and running on a stay. ... Origin: Cf. Dan. Hank handle, Sw. Hank a …

hanker
1. To long (for) with a keen appetite and uneasiness; to have a vehement desire; usually with for or after; as, to hanker after fruit; to hanker after the diversions of the town. 'He was hankering to join his friend.' (J. A. Symonds) ... 2. To linger in expectation or with desire. ... Origin: Prob. Fr. Hang; cf. D. Hunkeren, hengelen. ... Source: Webs …

Hanks dilators
Uterine dilator's of solid metal construction. ... (05 Mar 2000) ...

Hanks, Horace Tracy
<person> U.S. Surgeon, 1837-1900. ... See: Hanks dilators. ... (05 Mar 2000) ...

Hanks' solution
A salt solution usually used in combination with naturally occurring body substances (e.g., blood serum, tissue extracts) and/or more complex chemically defined nutritive solution's for culturing animal cells; two variations contain CaCl2, MgSO4-7H2O, KCl, KH2PO4, NaHCO3, NaCl, Na2HPO4-2H2O, and d-glucose. ... (05 Mar 2000) ...

Hanlon, C Rollins
<person> U.S. Cardiovascular and thoracic surgeon, *1915. ... See: Blalock-Hanlon operation. ... (05 Mar 2000) ...

Hannes Alfven
Synonym for Alfven, Hannes ... <person> Nobel Prize winning plasma physicist and astronomer who first suggested the possibility of magneto-hydrodynamic waves in 1942. Now deceased. ... (13 Nov 1997) ...

Hannover, Adolph
<person> Danish anatomist, 1814-1894. ... See: Hannover's canal. ... (05 Mar 2000) ...

Hannover's canal
The potential space between the ciliary zonule and the vitreous body. ... (05 Mar 2000) ...

Hanot, Victor
<person> French physician, 1844-1896. ... See: Hanot's cirrhosis. ... (05 Mar 2000) ...

Hanot's cirrhosis
Synonym for primary biliary cirrhosis ... <gastroenterology> A rare form of liver disease which results in the irreversible destruction of the liver and bile ducts. The cause is unknown, but is thought to be an autoimmune mechanism. ... (06 Mar 1998) ...

Hansemann macrophage
Large histiocytes with abundant cytoplasm that may contain Michaelis-Gutmann bodies and one or several nuclei; described in lesions of malacoplakia. ... (05 Mar 2000) ...

hansen disease
Synonym for leprosy ... <infectious disease> Caused by Mycobacterium leprae, an obligate intracellular parasite that survives lysosomal enzyme attack by possessing a waxy coat. ... Leprosy is a chronic disease associated with depressed cellular (but not humoral) immunity, the bacterium requires a lower temperature than 37­C and thrives particul …

Hansen, Gerhard
<person> Norwegian physician, 1841-1912. ... See: Hansen's bacillus, Hansen's disease. ... (05 Mar 2000) ...

Hansen's bacillus
Synonym for mycobacterium leprae ... A species of gram-positive, aerobic bacteria that causes leprosy in man. Its organisms are generally arranged in clumps, rounded masses, or in groups of bacilli side by side. ... (12 Dec 1998) ...

Hansen's disease
<infectious disease> Leprosy is a chronic granulomatous infection of humans by the bacterium Mycobacterium leprae. Leprosy affects the superficial tissues, especially the skin and peripheral nerves. It is estimated that there are between 10 and 20 million persons affected with leprosy in the world. Leprosy is most common in tropical climates …

hansenula
Yeast-like fungi, of the family saccharomycetaceae, order endomycetales isolated from trees, bark beetles, fruit, and soil. ... (12 Dec 1998) ...

hantaan virus
The type species of the genus hantavirus infecting the rodent apodemus agrarius and humans who come in contact with it. It causes syndromes of haemorrhagic fever associated with vascular and especially renal pathology. ... (12 Dec 1998) ...

hantavirus
<virology> A virus in the family Bunyaviridae that causes a type of haemorrhagic fever. ... It is thought that humans catch the disease mainly from infected rodents, either through direct contact with the animals or by inhaling or ingesting dust that contains their driedurine. ... (18 Nov 1997) ...

hantavirus infections
Infections with viruses of the genus hantavirus. This is associated with at least four clinical syndromes: haemorrhagic fever with renal syndrome caused by viruses of the hantaan group; a milder form of hfrs caused by seoul and related viruses; nephropathia epidemica caused by puumala and related viruses; and hantavirus pulmonary syndrome caused by …

hantavirus pulmonary syndrome
<syndrome> Acute respiratory illness in humans caused by the muerto canyon virus whose primary rodent reservoir is the deer mouse peromyscus maniculatus. First identified in the southwestern united states, this syndrome is characterised most commonly by fever, myalgias, headache, cough, and rapid respiratory failure. ... (12 Dec 1998) ...

hapalonychia
Thinning of nails resulting in bending and breaking of the free edge, with longitudinal fissures. ... Synonym: egg shell nail. ... Origin: hapalo-+ G. Onyx (onych-), nail ... (05 Mar 2000) ...

hapantotype
<zoology> One or more preparations of directly related individuals, representing differing stages in the life cycle, together forming a name-bearing type in an extinct species of Protozoa. ... (09 Jan 1998) ...

haphalgesia
Pain or an extremely disagreeable sensation caused by the merest touch. ... Synonym: Pitres' sign. ... Origin: G. Haphe, touch, + algesis, sense of pain ... (05 Mar 2000) ...

haphazard
Lacking any coherent system, organization, or objective; not to be confused with random or chaotic. ... (05 Mar 2000) ...

haphazard sampling
The assembly of data in an unprescribed and undefined fashion that allows no sound scientific inferences other than establishing the existence of types. (Finding even one unicorn in such a set would establish that unicorns can exist, but no inference about their prevalence could be made from it.) Cf.: random sample. ... (05 Mar 2000) ...

haphephobia
<psychology> A morbid dislike or fear of being touched. ... Synonym: aphephobia. ... Origin: G. Haphe, touch, + phobos, fear ... (05 Mar 2000) ...

haplo-
Simple, single. ... Origin: G. Haplous ... (05 Mar 2000) ...

haplodont
Having molar teeth with simple crowns, i.e., simple conical teeth without ridges or tubercles. ... Origin: haplo-+ G. Odous, tooth ... (05 Mar 2000) ...

haploid
<cell biology, genetics> Describes a nucleus, cell or organism possessing a single set of unpaired chromosomes. Gametes are haploid. ... (18 Nov 1997) ...

haploid number
<cell biology, genetics> The haploid number is the total number of chromosomes in a single set, such as would be found in a gamete or a haploid somatic cell (such as in fungus or gametophyte plants). In humans, the haploid number would be 23. ... (09 Oct 1997) ...

haploid set
The genetic content of a normal gamete in which every autosomal locus is represented by a single allele and either one full set of X-linked genes or one full set of Y-linked genes; the normal adult somatic cell contains two diploid set. ... (05 Mar 2000) ...

haploidiploidy
<cell biology, genetics> Haploidiploidy is a genetic system in which one sex of the species (usually the male) is haploid (has only one set of chromosomes) and develops from eggs which have not been fertilized by sperm, and the other sex (usually the female) is diploid (has two sets of chromosomes) and develops from fertilized eggs. An exampl …

haploidisation
<cell biology, genetics> Haploidisation is the process of creating a haploid cell from a diploid cell by progressively losing chromosomes through nondisjunction (they fail to separate equally into the daughter cells during mitosis). ... (09 Oct 1997) ...

haploidy
The number of chromosomes in the gametes, which is half the number normally found in somatic cells. Symbol: n. ... (12 Dec 1998) ...

haplology
The omission of syllables because of excessive speed of utterance. ... Origin: haplo-+ G. Logos, study ... (05 Mar 2000) ...

haplomitosis
<cell biology> Haplomitosis is a form of cell division which certain flagellates (a group of protozoans with flagella) undergo. It involves the separation of the genetic material in the nucleus into two groups. ... (09 Oct 1997) ...

haplophyte
<cell biology, genetics> Having the number of chromosomes characteristic of the gametes for the organism. ... (09 Oct 1997) ...

haploprotein
The functional complex between an apoprotein and the prosthetic group that together are responsible for biological activity. ... (05 Mar 2000) ...

haplorhini
A suborder of primates consisting of six families: cebidae (new world monkeys), cercopithecidae (old world monkeys), hylobatidae (gibbons and siamangs), pongidae (great apes), tarsiidae (tarsiers), and hominidae (humans). ... (12 Dec 1998) ...

haploscope
<instrument> An instrument for presenting separate views to each eye so that they may be seen as one. ... Origin: haplo-+ G. Skopeo, to view ... Mirror haploscope, a haploscope using mirrors to displace the field of view of the two eyes, as in Worth's amblyoscope and the synoptophore. ... (05 Mar 2000) ...

haploscopic
Relating to a haploscope. ... (05 Mar 2000) ...

haploscopic vision
Stereoscopic vision produced by the haploscope, or mirror-type stereoscope. ... (05 Mar 2000) ...

Haplosporidia
An order of sporozoans, now placed in the protozoan phylum Ascetospora, class Stellatosporea, that reproduce asexually by schizogony and produce spores but no flagella, though pseudopodia may be present. ... Origin: haplo-+ G. Sporos, seed ... (05 Mar 2000) ...

haplotype
<genetics> The set, made up of one allele of each gene, comprising the genotype. ... Also used to refer to the set of alleles on one chromosome or a part of a chromosome, i.e. One set of alleles of linked genes. Its main current usage is in connection with the linked genes of the major histocompatibility complex. ... (18 Nov 1997) ...

haplotypes
The genetic constitution of individuals with respect to one member of a pair of allelic genes; sets of single alleles or closely linked genes that tend to be inherited together, such as those of the major histocompatibility complex; portions of phenotypes determined by genes located on one of a pair of chromosomes. ... (12 Dec 1998) ...

happiness
Highly pleasant emotion characterised by outward manifestations of gratification; joy. ... (12 Dec 1998) ...

happy puppet syndrome
<syndrome> A syndrome characterised by mental retardation, ataxia, hypotonia, epileptic seizures, easily provoked and prolonged spasms of laughter, prognathism, and an open-mouthed expression. ... (05 Mar 2000) ...

Hapsburg jaw
Prognathism and pouting lower lip, characteristic of the Hispano-Austrian imperial dynasty. ... (05 Mar 2000) ...

Hapsburg lip
Synonym for Hapsburg jaw ... Prognathism and pouting lower lip, characteristic of the Hispano-Austrian imperial dynasty. ... (05 Mar 2000) ...

hapten
<immunology, molecular biology> Could be considered an isolated epitope: although a hapten (by definition) has an antibody directed against it, the hapten alone will not induce an immune response if injected into an animal, it must be conjugated to a carrier (usually a protein). ... The hapten constitutes a single antigenic determinant, perhap …

hapten inhibition of precipitation
Inhibition of precipitation that occurs when the precipitin has combined with hapten of the same specificity as the subsequently added antigen. ... (05 Mar 2000) ...

haptenic inhibition
Synonym for hapten ... <immunology, molecular biology> Could be considered an isolated epitope: although a hapten (by definition) has an antibody directed against it, the hapten alone will not induce an immune response if injected into an animal, it must be conjugated to a carrier (usually a protein). ... The hapten constitutes a single antigen …

haptens
Small antigenic determinants capable of eliciting an immune response only when coupled to a carrier. Haptens bind to antibodies but by themselves cannot elicit an antibody response. ... (12 Dec 1998) ...

hapteron
<botany> A holdfast, a specialised root-like projection that functions to anchor a plant. ... (09 Oct 1997) ...

haptic hallucination
The sensation of touch in the absence of stimuli; may be seen in alcoholic delirium tremens. ... (05 Mar 2000) ...

haptics
The science concerned with the tactile sense. ... Origin: G. Hapto, to grasp, touch ... (05 Mar 2000) ...

haptodysphoria
An unpleasant sensation derived from touching certain objects. ... Origin: G. Hapto, to touch, + dysphoria ... (05 Mar 2000) ...

haptoglobin
<protein> Acid _2 plasma glycoprotein that binds to oxyhaemoglobin that is free in the plasma and the complex is then removed in the liver. ... Tetrameric (2 _, 2 _ subunits): the existence of two different _ chains in humans means that haptoglobins can exist in three variants in heterozygotes. ... (18 Nov 1997) ...

haptoglobins
Plasma glycoproteins that form a stable complex with haemoglobin to aid the recycling of haem iron. They are encoded in man by a gene on the short arm of chromosome 16. ... (12 Dec 1998) ...

haptometer
Instrument for measuring sensitivity to touch. ... Origin: G. Hapto, to touch, + metron, measure ... (05 Mar 2000) ...

haptonema
<cell biology> Filament extending between the paired flagella of certain unicellular algae (haptophytes). Supported by 6 or 7 microtubules (not in an axoneme like array) and apparently used for capturing prey in a manner analogous to the axopodia of heliozoa. ... (18 Nov 1997) ...

haptotaxis
<cell biology> Strictly speaking, a directed response of cells in a gradient of adhesion, but often loosely applied to situations where an adhesion gradient is thought to exist and local trapping of cells seems to occur. ... (18 Nov 1997) ...

haptotropism
<biology> An orientation response of an organism to stimulation by touch. ... (09 Oct 1997) ...

Har
Synonym for homoarginine ... <chemical> Chemical name: L-Lysine, N(6)-(aminoiminomethyl)- ... (12 Dec 1998) ...

Harada
Einosuke, Japanese surgeon. ... Lived: 1892-1947. ... See: Harada's disease, Harada's syndrome. ... (05 Mar 2000) ...

Harada's disease
Synonym for Harada's syndrome ... <syndrome> Bilateral retinal oedema, uveitis, choroiditis, and retinal detachment, with temporary or permanent deafness, graying of the hair (poliosis), and alopecia; related to the Vogt-Koyanagi syndrome and sympathetic ophthalmia. ... Synonym: Harada's disease, uveoencephalitis, uveomeningitis syndrome. ... (0 …

Harada's syndrome
<syndrome> Bilateral retinal oedema, uveitis, choroiditis, and retinal detachment, with temporary or permanent deafness, graying of the hair (poliosis), and alopecia; related to the Vogt-Koyanagi syndrome and sympathetic ophthalmia. ... Synonym: Harada's disease, uveoencephalitis, uveomeningitis syndrome. ... (05 Mar 2000) ...

harbor
1. A station for rest and entertainment; a place of security and comfort; a refuge; a shelter. '[A grove] fair harbour that them seems.' (Spenser) 'For harbor at a thousand doors they knocked.' (Dryden) ... 2. Specif., A lodging place; an inn. ... 3. <astronomy> The mansion of a heavenly body. ... 4. A portion of a sea, a lake, or other large bo …

hard
1. With pressure; with urgency; hence, diligently; earnestly. 'And prayed so hard for mercy from the prince.' (Dryden) 'My father Is hard at study; pray now, rest yourself.' (Shak) ... 2. With difficulty; as, the vehicle moves hard. ... 3. Uneasily; vexatiously; slowly. (Shak) ... 4. So as to raise difficulties. ' The guestion is hard set'. (Sir T. Br …

hard cataract
Synonym for nuclear cataract ... A cataract involving the nucleus. ... Synonym: hard cataract. ... (05 Mar 2000) ...

hard chancre
<dermatology> The primary skin lesion of syphilis which begins at the site of infection after an interval of 10-30 days as a papule or red ulcerated skin lesion. ... (27 Sep 1997) ...

hard corn
The usual form of corn over a toe joint. ... Synonym: heloma durum. ... (05 Mar 2000) ...

hard pad disease
A form of canine distemper characterised by hyperkeratosis of the foot pads and nose. ... See: canine distemper. ... (05 Mar 2000) ...

hard pad virus
The virus causing hard pad disease, probably canine distemper virus, but sometimes not recovered. ... (05 Mar 2000) ...

hard palate
The bony part of the roof of the mouth. The hard palate is the front of the palate and is in front of the soft palate. ... (12 Dec 1998) ...

hard papilloma
Synonym for papilloma durum ... A wart, corn, or cutaneous horn. ... Synonym: hard papilloma. ... (05 Mar 2000) ...

hard paraffin
A purified mixture of solid hydrocarbons derived from petroleum. ... Synonym: paraffin. ... (05 Mar 2000) ...

hard pulse
A pulse that strikes forcibly against the tip of the finger and is with difficulty compressed, suggesting hypertension. ... Synonym: pulsus durus. ... (05 Mar 2000) ...

hard rays
Ray's of short wavelength and great penetrability. ... (05 Mar 2000) ...

hard science
A field of scientific study which involves precise measurements of observations and well-defined methods for obtaining and interpreting new knowledge. Chemistry and physics are definitely hard sciences, biology, geology, and astronomy also are usually thought of as hard sciences. Psychology, sociology, and anthropology are not, and are considered s …

hard soap
A soap made with olive oil, or some other suitable oil or fat, and sodium hydroxide; used as a detergent, and in the form of a suppository or soapsuds enema for constipation; used also as an excipient in pills. ... Synonym: Castile soap. ... (05 Mar 2000) ...

hard sore
Synonym for chancre ... The primary skin lesion of syphilis which begins at the site of infection after an interval of 10-30 days as a papule or red ulcerated skin lesion. ... (27 Sep 1997) ...

hard tarter
<dentistry> A calcium salt concretion which forms on your teeth. ... Calculus deposits form on the teeth in areas which you do not floss or brush. If these concretions are left to build up on the tooth enamel, they will irritate the gum tissue, push it away from the tooth and promote progressive bone loss. ... Eventually the teeth can loosen an …

hard tissue
Tissue that has become mineralised, tissue having a firm intercellular substance, e.g., cartilage and bone. ... (05 Mar 2000) ...

hard tubercle
A tubercle lacking necrosis. ... (05 Mar 2000) ...

hard ulcer
<dermatology> The primary skin lesion of syphilis which begins at the site of infection after an interval of 10-30 days as a papule or red ulcerated skin lesion. ... (27 Sep 1997) ...

hard water
<chemistry> Hard water is water which contains minerals like calcium carbonate, magnesium carbonate, bicarbonates, sulphates, or chlorides, because it has been exposed to rocks or rocky soils. ... Hard water can corrode, discolour, or deposit its minerals, in and around materials such as water pipes. ... (09 Oct 1997) ...

harden
1. To make hard or harder; to make firm or compact; to indurate; as, to harden clay or iron. ... 2. To accustom by labour or suffering to endure with constancy; to strengthen; to stiffen; to inure; also, to confirm in wickedness or shame; to make unimpressionable. 'Harden not your heart.' 'I would harden myself in sorrow.' (Job vi. 10) ... Origin: OE …

Harden-Young ester
D-fructose 1,6-bisphosphate;important intermediate in sugar metabolism. ... (05 Mar 2000) ...