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

asthma crystals
Synonym for Charcot-Leyden crystals ... Crystal's in the shape of elongated double pyramids, formed from eosinophils, found in the sputum in bronchial asthma and in other exudates or transudates containing eosinophils. ... Synonym: asthma crystals, Charcot-Neumann crystals, Charcot-Robin crystals, Leyden's crystals. ... (05 Mar 2000) ...

asthma-weed
Synonym: lobelia. ... Synonym: Euphorbia pilulifera. ... (05 Mar 2000) ...

asthma, exercise-induced
Asthma attacks following a period of exercise. Usually the induced attack is short-lived and regresses spontaneously. The magnitude of postexertional airway obstruction is strongly influenced by the environment in which exercise is performed (i.e. Inhalation of cold air during physical exertion markedly augments the severity of the airway obstructi …

asthmatic
Relating to or suffering from asthma. ... (05 Mar 2000) ...

asthmatic bronchitis
Bronchitis that causes or aggravates bronchospasm. ... (05 Mar 2000) ...

asthmogenic
Causing asthma. ... (05 Mar 2000) ...

astigmatic dial
A diagram of radiating lines, used to test for astigmatism. ... (05 Mar 2000) ...

astigmatic lens
Synonym for cylindrical lens ... A lens in which one of the surfaces is curved in one meridian and less curved in the opposite meridian; e.g., a teaspoon or a football. ... Synonym: astigmatic lens. ... (05 Mar 2000) ...

astigmatism
<ophthalmology> A visual disturbance caused by an error in the refraction of light within the eye. ... (27 Sep 1997) ...

astigmatism against the rule
Astigmatism when the greater curvature or refractive power is in the horizontal meridian. ... (05 Mar 2000) ...

astigmatism of oblique pencils
An aberration occurring when a bundle of light rays strikes a refracting medium in some other direction than parallel to the axis of the lens. ... (05 Mar 2000) ...

astigmatism with the rule
Astigmatism when the greater curvature or refractive power is in the vertical meridian. ... (05 Mar 2000) ...

astigmatometry
Determination of the form and measurement of the degree of astigmatism. ... (05 Mar 2000) ...

astigmia
Synonym for astigmatism ... <ophthalmology> A visual disturbance caused by an error in the refraction of light within the eye. ... (27 Sep 1997) ...

astomatous
Without a mouth. ... Synonym: astomous. ... (05 Mar 2000) ...

astomia
Congenital absence of a mouth. ... Origin: G. A-priv. + stoma, mouth ... (05 Mar 2000) ...

astomous
Synonym for astomatous ... Without a mouth. ... Synonym: astomous. ... (05 Mar 2000) ...

Aston, Francis William
<person, radiobiology> Physicist at Cambridge University who invented the mass spectrometer in 1919, a device which could measure the mass of individual atoms. This device led to his discovery that the helium nucleus was less massive than the two hydrogen nuclei which could have formed it (implying that the missing mass could somehow be conve …

astonish
1. To stun; to render senseless, as by a blow. 'Enough, captain; you have astonished him. [Fluellen had struck Pistol]' (Shak) 'The very cramp-fish [i. E, torpedo] . . . Being herself not benumbed, is able to astonish others.' (Holland) ... 2. To strike with sudden fear, terror, or wonder; to amaze; to surprise greatly, as with something unaccountab …

astragalectomy
<procedure> Removal of the astragalus, or talus. ... Origin: astragalus, + G. Ektome, excision ... (05 Mar 2000) ...

astragalocalcanean
Relating to both the talus (astragalus) and the calcaneus (os calcis). ... (05 Mar 2000) ...

astragalofibular
Relating to both the talus (astragalus) and the fibula. ... (05 Mar 2000) ...

astragaloscaphoid
Synonym for talonavicular ... Relating to the talus and the navicular bone. ... Synonym: astragaloscaphoid, taloscaphoid. ... (05 Mar 2000) ...

astragalotibial
Relating to both the talus (astragalus) and the tibia. ... (05 Mar 2000) ...

astragalus
1. <anatomy> The ankle bone, or hock bone; the bone of the tarsus which articulates with the tibia at the ankle. ... 2. <botany> A genus of papilionaceous plants, of the tribe Galegeae, containing numerous species, two of which are called, in English, milk vetch and licorice vetch. Gum tragacanth is obtained from different oriental speci …

astral
Relating to an astrosphere. ... (05 Mar 2000) ...

astral fibres
Fibre's (fibrils) radiating from the centrosphere toward the periphery of the cell as seen with a light microscope; revealed as microtubules under the electron microscope. ... Compare: kinetochore fibres, polar fibres. ... (05 Mar 2000) ...

astrapophobia
<psychology> Morbid fear of lightning. ... Origin: G. Astrape, lightning, + phobos, fear ... (05 Mar 2000) ...

astriction
1. The act of binding; restriction; also, obligation. ... 2. <medicine> A contraction of parts by applications; the action of an astringent substance on the animal economy. Constipation. ... 3. Astringency. ... 4. An obligation to have the grain growing on certain lands ground at a certain mill, the owner paying a toll. ... The lands were said to …

astringent
<pharmacology> Causing contraction, usually locally after topical application. ... Origin: L. Astringens ... (18 Nov 1997) ...

astringents
Agents that cause contraction, usually locally after topical application. ... (12 Dec 1998) ...

astrobiology
<study> The study of life that potentially exists on planets or celestial bodiesother thanEarth. ... (09 Oct 1997) ...

astroblast
An embryonic astrocyte. ... (18 Nov 1997) ...

astroblastoma
<oncology, tumour> A rare form of cancer characterised by tumours made up of large cells withtwo or three nuclei. ... (09 Oct 1997) ...

astrocele
Synonym: centrosphere. ... Origin: G. Astron, star, + koilia, hollow ... (05 Mar 2000) ...

astrocyte
<pathology> A glial cell found in vertebrate brain, named for its characteristic star like shape. ... Astrocytes lend both mechanical and metabolic support for neurons, regulating the environment in which they function. ... See: oligodendrocytes. ... (18 Nov 1997) ...

astrocytes
The largest and most numerous neuroglial cells in the brain and spinal cord. Astrocytes (from 'star' cells) are irregularly shaped with many long processes, including those with 'end feet' which form the glial (limiting) membrane and directly and indirectly contribute to the blood-brain barrier. They regulate the extracellular ionic and chemical en …

astrocytoma
<oncology, tumour> A neuro ectodermal tumour (glioma) arising from astrocytes. Probably the commonest glioma, it has a tendency to become anaplastic. ... (18 Nov 1997) ...

astrocytosis
<pathology> An abnormal increase in the number of astrocytes due to the destruction of nearby neurons, typically because of hypoglycaemia or oxygen deprivation. ... (09 Oct 1997) ...

astrocytosis cerebri
Synonym for gliomatosis cerebri ... A diffuse intracranial neoplasm of astrocytic origin. ... Synonym: astrocytosis cerebri, glioblastosis cerebri. ... (05 Mar 2000) ...

astroependymoma
<tumour> A glial neoplasm composed of a mixed population of astrocytic and ependymal cells. ... (05 Mar 2000) ...

astroglia
Synonym for astrocytes ... The largest and most numerous neuroglial cells in the brain and spinal cord. Astrocytes (from 'star' cells) are irregularly shaped with many long processes, including those with 'end feet' which form the glial (limiting) membrane and directly and indirectly contribute to the blood-brain barrier. They regulate the extracell …

astroglia cell
Synonym for astrocyte ... <pathology> A glial cell found in vertebrate brain, named for its characteristic star like shape. ... Astrocytes lend both mechanical and metabolic support for neurons, regulating the environment in which they function. ... See: oligodendrocytes. ... (18 Nov 1997) ...

astrogliosis
<pathology> Hypertrophy of the astroglia, usually in response to injury. ... (18 Nov 1997) ...

astroid
Star-shaped. ... Origin: G. Astroeides, fr. Astron, star, + eidos, resemblance ... (05 Mar 2000) ...

astrokinetic
Relating to movement of the centrosome and astrosphere of a dividing cell. ... Origin: G. Astron, star, + kinesis, movement ... (05 Mar 2000) ...

astrolabe
1. <astronomy> An instrument for observing or showing the positions of the stars. It is now disused. ... Among the ancients, it was essentially the armillary sphere. A graduated circle with sights, for taking altitudes at sea, was called an astrolabe in the 18th century. It is now superseded by the quadrant and sextant. ... 2. A stereographic p …

astrolithology
<study> The science of aerolites. ... (04 Mar 1998) ...

astrology
<study> In its etymological signification, the science of the stars; among the ancients, synonymous with astronomy; subsequently, the art of judging of the influences of the stars upon human affairs, and of foretelling events by their position and aspects. ... Astrology was much in vogue during the Middle Ages, and became the parent of modern …

astrometeorology
<study> The investigation of the relation between the sun, moon, and stars, and the weather. Astrometeorological, Astrometeorologist. ... (04 Mar 1998) ...

astronauts
Members of spacecraft crew including those who travel in space, and those in training for space flight. ... (12 Dec 1998) ...

astronomy
1. Astrology. 'Not from the stars do I my judgment pluck; And yet methinks I have astronomy.' (Shak) ... 2. The science which treats of the celestial bodies, of their magnitudes, motions, distances, periods of revolution, eclipses, constitution, physical condition, and of the causes of their various phenomena. ... 3. A treatise on, or text-book of, t …

astrosphere
A set of radiating microtubules extending outward from the cytocentrum and centrosphere of a dividing cell. ... Synonym: aster, attraction sphere, Lavdovsky's nucleoid, paranuclear body. ... Origin: G. Astron, star, + sphaira, ball ... (05 Mar 2000) ...

astrotactin
<protein> Neuronal surface glycoprotein with an apparent Mr 100 kD, thought to function as a neuron glia ligand in the binding of cerebellar granule neurons to astroglia. Expressed transiently in the cerebellum of the developing mammalian brain during periods of glia guided neuronal migration. ... (18 Nov 1997) ...

astrotheology
<study> Theology founded on observation or knowledge of the celestial bodies. ... (04 Mar 1998) ...

astroviridae
A family of RNA viruses with one genus: astrovirus. They cause gastroenteritis in humans and also infect other vertebrates. ... (12 Dec 1998) ...

astroviridae infections
Infections with astrovirus, causing gastroenteritis in human infants, calves, lambs, and piglets. ... (12 Dec 1998) ...

astrovirus
A genus of small, circular RNA viruses in the family astroviridae. They cause gastroenteritis and are found in the stools of several vertebrates including humans. Transmission is by the faecal-oral route. There are at least seven human serotypes and the type species is human astrovirus 1. ... (12 Dec 1998) ...

astroviruses
<virology> Spherical viruses with 5 or 6 pointed star shaped surface pattern. May be associated with enteritis in various vertebrates. ... (18 Nov 1997) ...

Astrup, Poul
<person> Danish clinical chemist, *1915. ... See: micro-Astrup method. ... (05 Mar 2000) ...

Astwood, Edwin
<person> U.S. Endocrinologist, 1909-1976. ... See: Astwood's test. ... (05 Mar 2000) ...

Astwood's test
Synonym for metrotrophic test ... A test for the assay of oestrogenic substances; immature female rats (25 to 49 g) are injected subcutaneously with the hormone and killed after 6 hours, when the increase in uterine weight (due largely to imbibation of water) is taken as the criterion of oestrogenic activity. ... Synonym: Astwood's test. ... (05 Mar 2 …

astz
An abbreviation that stands for antistreptozyme test. This haemagglutination blood test is a very sensitive of a recent streptococcal infection. ... (27 Sep 1997) ...

asverin
1-Methyl-3-piperidylidenedi(2-thienyl)methane;an antitussive. ... (05 Mar 2000) ...

Asx
Symbol meaning Asp or Asn. ... (05 Mar 2000) ...

asyllabia
Form of alexia in which one recognises individual letters, but cannot comprehend them when arranged collectively in syllables or words. ... Origin: G. A-priv. + syllable, syllable ... (05 Mar 2000) ...

asylum
Old term for an institution for the housing and care of those who by reason of age or mental or bodily infirmities are unable to care for themselves. ... Origin: L. Fr. G. Asylon, a sanctuary, fr. A-priv. + syle, right of seizure ... (05 Mar 2000) ...

asymbolia
A form of aphasia in which the significance of signs and symbols is not appreciated. ... Synonym: sight blindness. ... Synonym: asemasia, asaemia. ... Origin: G. A-priv. + symbolon, an outward sign ... (05 Mar 2000) ...

asymmetric
Not symmetrical; denoting a lack of symmetry between two or more like parts. ... (05 Mar 2000) ...

asymmetric centre
<chemistry> Same as a chiral centre, a tetrahedral carbon atom that bears four different substituents. ... (09 Jan 1998) ...

asymmetric disulfide
Synonym for mixed disulfide ... <chemistry> Disulfide which is not symmetric on both sides of the -s-s- linkage; e.g., the disulfide formed between coenzyme A and glutathione or between cysteine and coenzyme A or glutathione. ... Synonym: asymmetric disulfide. ... (05 Mar 2000) ...

asymmetric motor neuropathy
Neuropathy in which the loss of function is more marked in the extremities of one side of the body, old term for diabetic polyradiculopathy. ... (05 Mar 2000) ...

asymmetrical chondrodystrophy
Synonym for enchondromatosis ... Benign growths of cartilage in the metaphyses of several bones. ... (12 Dec 1998) ...

asymptomatic
<symptom> Without obvious signs or symptoms of disease. Cancer may cause symptoms and warning signs, but, especially in its early stages, cancer may develop and grow without producing any symptoms. ... (14 May 1997) ...

asymptomatic coccidioidomycosis
Synonym for latent coccidioidomycosis ... A form of coccidioidomycosis not differentiated clinically from upper respiratory infections of viral or bacterial aetiology; positive skin tests are useful in demonstrating past and present infections; tests for circulating serum antibodies are prognostic as well as diagnostic in some cases. ... Synonym: asy …

asymptomatic neurosyphilis
Clinically inapparent (except for possible abnormal pupils) syphilitic meningeal infection, diagnosed by examination of the cerebrospinal fluid; if untreated, often develops into some form of symptomatic neurosyphilis. ... (05 Mar 2000) ...

asymptote
<mathematics> A line which approaches nearer to some curve than assignable distance, but, though infinitely extended, would never meet it. Asymptotes may be straight lines or curves. A rectilinear asymptote may be conceived as a tangent to the curve at an infinite distance. ... Origin: Gr. Not falling together; priv. + to fall together; with + …

asymptotic
Pertaining to a limiting value, for example of a dependent variable, when the independent variable approaches zero or infinity. ... (05 Mar 2000) ...

asynchronous pulse generator
A generator in which the rate of discharge is independent of the natural activity of the heart. ... Synonym: fixed rate pulse generator. ... (05 Mar 2000) ...

asynclitism
Absence of synclitism or parallelism between the axis of the presenting part of the child and the pelvic planes in childbirth. ... Synonym: obliquity. ... Origin: G. A-priv. + syn-klino, to incline together ... (05 Mar 2000) ...

asyndesis
1. Rarely used term for a mental defect in which separate ideas or thoughts cannot be joined into a coherent concept. ... 2. A breaking up of the connecting links in language, said to be characteristic of the language disturbance of schizophrenics. ... Origin: G. A-priv. + syn, together, + desis, binding ... (05 Mar 2000) ...

asynechia
Discontinuity of structure. ... Origin: G. A-priv. + synecheia, continuity ... (05 Mar 2000) ...

asynergia
Synonym: asynergy. ... Origin: G. A-priv. + syn, with, + ergon, work ... (05 Mar 2000) ...

asynergic
Characterised by asynergia. ... (05 Mar 2000) ...

asynergy
Lack of coordination among various muscle groups during the performance of complex movements, resulting in loss of skill and speed. When severe, results in decomposition of movement, wherein complex motor acts are performed in a series of isolated movements; caused by cerebellar disorders. ... Synonym: asynergia. ... (05 Mar 2000) ...

asynesia
Asynesis ... Lack of easy comprehension and practical intelligence. ... Origin: G. A-priv. + synesis, union, understanding ... (05 Mar 2000) ...

asystematic
Not systematic; not relating to one system or set of organs. ... (05 Mar 2000) ...

asystole
<cardiology> Cardiac standstill or arrest, absence of a heartbeat. ... Synonym: Beau's syndrome. ... (18 Nov 1997) ...

asystolia
Synonym for asystole ... <cardiology> Cardiac standstill or arrest, absence of a heartbeat. ... Synonym: Beau's syndrome. ... (18 Nov 1997) ...

asystolic
1. Relating to asystole. ... 2. Not systolic. ... (05 Mar 2000) ...

At
<abbreviation> The adenine-thymine hydrogen-bonded base pair observed in double-stranded polynucleotides. ... Symbol for astatine. ... (05 Mar 2000) ...

AT content
<molecular biology> The percentage of nitrogenous bases on a DNA molecule which are either adenine or thymine (from a possibility of four different ones, also including cytosine and guanine). ... See: GC content. ... (09 Oct 1997) ...

at one
1. In concord or friendship; in agreement (with each other); as, to be, bring, make, or set, at one, i. E, to be or bring in or to a state of agreement or reconciliation. 'If gentil men, or othere of hir contree Were wrothe, she wolde bringen hem atoon.' (Chaucer) ... 2. Of the same opinion; agreed; as, on these points we are at one. ... 3. Together. …

at wt
<abbreviation> Atomic weight. ... (05 Mar 2000) ...

at-gc ratio
<molecular biology> The ratio of adenine-thymine base pairs to guanine-cytosine base pairs on a DNA molecule. ... (09 Oct 1997) ...

AT-I acetyltransferase
<enzyme> An monomorphic isoenzyme of EC 2.3.1.5 from syrian hamsters which catalyses o-acetylation of n-hydroxylamines and n-acetylation of arylamines and hydrazines; amino acid sequence given in first source ... Registry number: EC 2.3.1.- ... (26 Jun 1999) ...

AT-II acetyltransferase
<enzyme> A polymorphic isoenzyme of EC 2.3.1.5 from syrian hamsters which catalyses o-acetylation of n-hydroxylamines and n-acetylation of arylamines and hydrazines; amino acid sequence given in first source ... Registry number: EC 2.3.1.- ... Synonym: at-b acetyltransferase ... (26 Jun 1999) ...

ata
<abbreviation> Atmosphere absolute. ... (05 Mar 2000) ...

atactic
<chemistry> This describes a polymer that has no regularly repeated structural units. ... (09 Oct 1997) ...

atactic abasia
Synonym for ataxic abasia ... Difficulty in walking due to ataxia of the legs. ... (05 Mar 2000) ...