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

weigert-meyer rule
<radiology> Applies to duplex collecting systems, upper-pole ureter, obstruction most likely to be hydronephrosis, inserts more inferiorly and medially in bladder, may insert into urethra, vagina, etc., males not incontinent: insertion above ext. Sphincter, associated with ureterocele, lower-pole ureter, reflux most likely to be pyelonephriti …

Weigert, Carl
<person> German pathologist, 1845-1904. ... See: Weigert's law, Weigert's iodine solution. See entries under stain. ... (05 Mar 2000) ...

Weigert's iodine solution
An iodine-potassium iodide mixture used as a reagent to alter crystal and methyl violet so that they are retained by certain bacteria and fungi. ... (05 Mar 2000) ...

Weigert's iron haematoxylin stain
<technique> A nuclear staining solution containing haematoxylin, ferric chloride, and hydrochloric acid; useful in combination with von Gieson's stain, especially for demonstrating connective tissue elements or Entamoeba histolytica in sections. ... (05 Mar 2000) ...

Weigert's law
The loss or destruction of a part or element in the organic world is likely to result in compensatory replacement and overproduction of tissue during the process of regeneration or repair (or both), as in the formation of callus when a fractured bone heals. ... Synonym: overproduction theory. ... (05 Mar 2000) ...

Weigert's stain
<technique> 1. For actinomyces, a staining method using immersion in a dark red orsellin solution in alcohol, then staining in crystal-violet solution. ... See: iron haematoxylin. ... 2. For elastin, a staining solution of fuchsin, resorcin, and ferric chloride; elastic fibres stain blue-black. ... 3. For fibrin, a staining method using solution …

weigh
1. To have weight; to be heavy. 'They only weigh the heavier.' ... 2. To be considered as important; to have weight in the intellectual balance. 'Your vows to her and me . . . Will even weigh.' (Shak) 'This objection ought to weigh with those whose reading is designed for much talk and little knowledge.' (Locke) ... 3. To bear heavily; to press hard. …

weight
1. The quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect of gravitative force, especially when expressed in certain units or standards, as pounds, grams, etc. ... Weight differs from gravity in being the effect of gravity, or the downward pressure of a body under the influence of gravity; h …

weight gain
Increase in body weight over existing weight. ... (12 Dec 1998) ...

weight lifting
A sport in which weights are lifted competitively or as an exercise. ... (12 Dec 1998) ...

weight loss
Decrease in existing body weight. ... (12 Dec 1998) ...

weight perception
Recognition and discrimination of the heaviness of a lifted object. ... (12 Dec 1998) ...

weight sense
Synonym for pressure sense ... The faculty of discriminating various degrees of pressure on the surface. ... Synonym: baresthesia, piesesthesia, weight sense. ... (05 Mar 2000) ...

weight-bearing
The physical state of supporting an applied load. This often refers to the weight-bearing bones or joints that support the body's weight, especially those in the spine, hip, knee, and foot. ... (12 Dec 1998) ...

weightlessness
Condition in which no acceleration, whether due to gravity or any other force, can be detected by an observer within a system. It also means the absence of weight or the absence of the force of gravity acting on a body. Microgravity, gravitational force between 0 and 10 -6 g, is included here. ... (12 Dec 1998) ...

weightlessness countermeasures
Techniques and routines designed to prevent or reverse unwanted effects of weightlessness experienced during actual and simulated space flight, including physiologic changes related to removal of gravitational loading. Specific measures include creation of artificial gravity, exercise, low-level lower body negative pressure, and use of anti-decondi …

weightlessness simulation
Condition under normal earth gravity where the force of gravity itself is not actually altered but its influence or effect may be modified and studied. ... (12 Dec 1998) ...

weights and measures
A unit or standard of measurement. ... (12 Dec 1998) ...

Weil disease
<microbiology> Infections of humans and many animals caused by organisms of the genus Leptospira. ... (18 Nov 1997) ...

Weil-Felix reaction
Synonym for Weil-Felix test ... <investigation> A serologic fluorescent antibody screen that indicates infection with the rickettsial bacteria which is responsible for Rocky Mountain spotted fever. This test may also be positive in brucellosis, salmonella infection and tularaemia. ... (27 Sep 1997) ...

Weil-Felix test
<investigation> A serologic fluorescent antibody screen that indicates infection with the rickettsial bacteria which is responsible for Rocky Mountain spotted fever. This test may also be positive in brucellosis, salmonella infection and tularaemia. ... (27 Sep 1997) ...

Weil, Adolf
<person> German physician, 1848-1916. ... See: Weil's disease, Larrey-Weil disease. ... (05 Mar 2000) ...

Weil, Edmund
<person> Austrian physician, 1880-1922. ... See: Weil-Felix reaction, Weil-Felix test. ... (05 Mar 2000) ...

Weil, Ludwig
<person> German dentist, 1849-1895. ... See: Weil's basal layer, Weil's basal zone. ... (05 Mar 2000) ...

Weil's basal layer
The layer beneath the odontoblasts of the tooth; it contains reticular fibres but few if any cells. ... Synonym: Weil's basal zone. ... (05 Mar 2000) ...

Weil's basal zone
Synonym for Weil's basal layer ... The layer beneath the odontoblasts of the tooth; it contains reticular fibres but few if any cells. ... Synonym: Weil's basal zone. ... (05 Mar 2000) ...

weil's disease
A severe form of leptospirosis caused by leptospira interrogans serogroup icterohaemorrhagica and transmitted to man by the rat. ... (12 Dec 1998) ...

Weill-Marchesani syndrome
<syndrome> Ectopia lentis (lens abnormally round and small), short stature, and brachydactyly; recessive autosomal inheritance. ... (05 Mar 2000) ...

Weill, Georges
<person> French ophthalmologist, 1866-1952. ... See: Weill-Marchesani syndrome. ... (05 Mar 2000) ...

Weill, Jean
<person> French physician, *1903. ... See: Leri-Weill disease, Leri-Weill syndrome. ... (05 Mar 2000) ...

Weinberg, Michel
<person> French pathologist, 1868-1940. ... See: Weinberg's reaction. ... (05 Mar 2000) ...

Weinberg, Wilhelm
<person> German physician, 1862-1937. ... See: Hardy-Weinberg equilibrium, Hardy-Weinberg law. ... (05 Mar 2000) ...

Weinberg's reaction
A complement fixation test of the presence of hydatid disease. ... (05 Mar 2000) ...

Weingrow's reflex
Synonym for aponeurotic reflex ... Plantar flexion of the foot and toes elicited by tapping the sole near its outer edge; has the same significance as the Rossolimo toe flexion reflex Also called Guillain-Barre, Weingrow's, or sole tap reflex. ... Synonym: Guillain-Barre reflex, sole tap reflex, Weingrow's reflex. ... (05 Mar 2000) ...

Weir Mitchell treatment
Synonym for Mitchell's treatment ... Treatment of mental illness by rest, nourishing diet, and a change of environment. ... Synonym: Weir Mitchell treatment. ... (05 Mar 2000) ...

Weir Mitchell's disease
Synonym for erythromelalgia ... Disease marked by paroxysmal, bilateral vasodilatation, particularly of the extremities, with burning pain, and increased skin temperature and redness. ... (12 Dec 1998) ...

Weir, Robert
<person> U.S. Surgeon, 1838-1927. ... See: Weir's operation. ... (05 Mar 2000) ...

Weir's operation
An obsolete eponym for appendicostomy. ... (05 Mar 2000) ...

weird
1. Of or pertaining to fate; concerned with destiny. ... 2. Of or pertaining to witchcraft; caused by, or suggesting, magical influence; supernatural; unearthly; wild; as, a weird appearance, look, sound, etc. 'Myself too had weird seizures.' (Tennyson) 'Those sweet, low tones, that seemed like a weird incantation.' (Longfellow) Weird sisters, the F …

Weisbach, Albin
<person> Austrian anthropologist, 1837-1914. ... See: Weisbach's angle. ... (05 Mar 2000) ...

Weisbach's angle
A craniometric angle formed by the junction, at the alveolar point, of lines passing from the basion and from the middle of the frontonasal suture. ... (05 Mar 2000) ...

Weismann germ plasm theory
<genetics> The theory that organisms maintain genetic continuity from organism to offspring through the germ line cells (germ plasm) and that the other (somatic) cells play no part in the transmission of heritable factors. ... (18 Nov 1997) ...

Weismann, August Friedrich Leopold
<person> German biologist, 1834-1914. ... See: weismannism. ... (05 Mar 2000) ...

weismannism
Theory of the noninheritance of acquired characteristics. ... (05 Mar 2000) ...

Weiss, Nathan
<person> Austrian physician, 1851-1883. ... See: Weiss' sign. ... (05 Mar 2000) ...

Weiss, Soma
<person> U.S. Physician, 1898-1942. ... See: Charcot-Weiss-Baker syndrome, Mallory-Weiss lesion, Mallory-Weiss syndrome, Mallory-Weiss tear. ... (05 Mar 2000) ...

Weiss' sign
Synonym for Chvostek's sign ... <clinical sign> In tetany, tapping the muscles of the face causes them to go into spasm. Chvostek's sign is positive in cases of severe hypocalcaemia. ... (27 Sep 1997) ...

Weitbrecht, Josias
<person> German-Russian anatomist in St. Petersburg, 1702-1747. ... See: Weitbrecht's cartilage, Weitbrecht's cord, Weitbrecht's fibres, Weitbrecht's foramen, Weitbrecht's ligament, apparatus ligamentosus weitbrechti. ... (05 Mar 2000) ...

Weitbrecht's cartilage
Synonym for articular disc of acromioclavicular joint ... The articular disk of fibrocartilage usually found between the acromial end of the clavicle and the medial border of the acromion. ... Synonym: discus articularis acromioclavicularis, acromioclavicular disk, Weitbrecht's cartilage. ... (05 Mar 2000) ...

Weitbrecht's cord
Synonym for oblique ligament of elbow joint ... A slender band extending from the lateral part of the coronoid process of the ulna distad and laterad to the radius immediately distal to the bicipital tuberosity. ... Synonym: chorda obliqua, oblique cord, round ligament of elbow joint, Weitbrecht's cord, Weitbrecht's ligament. ... (05 Mar 2000) ...

Weitbrecht's fibres
Synonym for retinaculum of articular capsule of hip ... One of several longitudinal folds of the articular capsule of the hip joint reflected onto the femoral neck deep to which the retinacular branches of the medial femoral circumflex artery pass to reach the femoral head. ... Synonym: retinaculum capsulae articularis coxae, Weitbrecht's fibres. ... …

Weitbrecht's foramen
An opening in the articular capsule of the shoulder joint, communicating with the subtendinous bursa of the subscapularis muscle. ... (05 Mar 2000) ...

Weitbrecht's ligament
Synonym for oblique ligament of elbow joint ... A slender band extending from the lateral part of the coronoid process of the ulna distad and laterad to the radius immediately distal to the bicipital tuberosity. ... Synonym: chorda obliqua, oblique cord, round ligament of elbow joint, Weitbrecht's cord, Weitbrecht's ligament. ... (05 Mar 2000) ...

Welander, Lisa
<person> Swedish neurologist, *1909. ... See: Kugelberg-Welander disease, Wohlfart-Kugelberg-Welander disease. ... (05 Mar 2000) ...

Welch, William
<person> U.S. Pathologist, 1850-1934. ... See: Welch's bacillus. ... (05 Mar 2000) ...

Welch's bacillus
Synonym for clostridium perfringens ... The most common aetiologic agent of gas gangrene. It is differentiable into several distinct types based on the distribution of twelve different toxins. ... (12 Dec 1998) ...

Welcker, Hermann
<person> German anthropologist and anatomist, 1822-1898. ... See: Welcker's angle. ... (05 Mar 2000) ...

Welcker's angle
Synonym for sphenoidal angle of parietal bone ... The anterior inferior angle of the parietal bone. ... Synonym: angulus sphenoidalis ossis parietalis, sphenoid angle, sphenoidal angle, Welcker's angle. ... (05 Mar 2000) ...

welcome
1. Salutation to a newcomer. 'Welcome ever smiles.' ... 2. Kind reception of a guest or newcomer; as, we entered the house and found a ready welcome. 'His warmest welcome at an inn.' (Shenstone) 'Truth finds an entrance and a welcome too.' (South) To bid welcome, to receive with professions of kindness. 'To thee and thy company I bid A hearty welcom …

weld
1. <botany> An herb (Reseda luteola) related to mignonette, growing in Europe, and to some extent in America; dyer's broom; dyer's rocket; dyer's weed; wild woad. It is used by dyers to give a yellow colour. ... Alternative forms: woald, wold, and would. ... 2. Colouring matter or dye extracted from this plant. ... Origin: OE. Welde; akin to Sco …

welder's conjunctivitis
Synonym for ultraviolet keratoconjunctivitis ... Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. ... Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. ... (05 Mar 2000) ...

welder's lung
Relatively benign form of pneumoconiosis, associated with welding, resulting from deposit of fine metallic particles in the lung. ... (05 Mar 2000) ...

well
1. Good in condition or circumstances; desirable, either in a natural or moral sense; fortunate; convenient; advantageous; happy; as, it is well for the country that the crops did not fail; it is well that the mistake was discovered. 'It was well with us in Egypt.' (Num. Xi. 18) ... 2. Being in health; sound in body; not ailing, diseased, or sick; h …

well counter
A scintillation crystal shaped with a central hole to receive a small sample, plus associated detector and electronics. ... (05 Mar 2000) ...

Wells, G
<person> 20th century British dermatologist. ... See: Wells' syndrome. ... (05 Mar 2000) ...

Wells, Michael Vernon
<person> 20th century English physician. ... See: Muckle-Wells syndrome. ... (05 Mar 2000) ...

Wells' syndrome
<syndrome> Recurrent cellulitis followed by brawny edematous skin lesions, or a less acute presentation of papular, annular, or gyrate skin lesions which are sometimes urticarial; affected skin and subcutis are heavily infiltrated by eosinophils and histiocytes, with scattered small necrotic foci (flame figures) of varied aetiology; sometimes …

welt
1. That which, being sewed or otherwise fastened to an edge or border, serves to guard, strengthen, or adorn it; as; A small cord covered with cloth and sewed on a seam or border to strengthen it; an edge of cloth folded on itself, usually over a cord, and sewed down. ... A hem, border, or fringe. ... In shoemaking, a narrow strip of leather around a …

welter
To wither; to wilt. 'Weltered hearts and blighted . . . Memories.' (I. Taylor) ... Origin: Cf. Wilt. ... 1. To roll, as the body of an animal; to tumble about, especially in anything foul or defiling; to wallow. 'When we welter in pleasures and idleness, then we eat and drink with drunkards.' (Latimer) 'These wizards welter in wealth's waves.' (Spens …

welwitschia
<botany> An African plant (Welwitschia mirabilis) belonging to the order Gnetaceae. It consists of a short, woody, topshaped stem, and never more than two leaves, which are the cotyledons enormously developed, and at length split into diverging segments. ... Origin: NL. So named after the discoverer, Dr. Friedrich Welwitsch. ... Source: Webster …

wen
Old term for pilar cyst. ... Origin: A.S. ... (05 Mar 2000) ...

wench
1. A young woman; a girl; a maiden. 'Lord and lady, groom and wench.' (Chaucer) 'That they may send again My most sweet wench, and gifts to boot.' (Chapman) 'He was received by the daughter of the house, a pretty, buxom, blue-eyed little wench.' (W. Black) ... 2. A low, vicious young woman; a drab; a strumpet. 'She shall be called his wench or his l …

Wenckebach block
A form of block in any cardiac tissue (most often the atrioventricular junction) in which there is progressive lengthening of conduction until the beat is dropped. ... (05 Mar 2000) ...

Wenckebach period
A sequence of cardiac cycles in the electrocardiogram ending in a dropped beat due to A-V block, the preceding cycles showing progressively lengthening P-R intervals; the P-R interval following the dropped beat is again shortened. ... (05 Mar 2000) ...

Wenckebach phenomenon
Progressive lengthening of conduction time in any cardiac tissue (most often the A-V node or junction) with ultimate dropping of a beat (A-V Wenckebach) or reversion to the initial conduction time (as in QRS Wenckebach). ... (05 Mar 2000) ...

Wenckebach, Karel
<person> Dutch internist, 1864-1940. ... See: Wenckebach block, Wenckebach period, Wenckebach phenomenon. ... (05 Mar 2000) ...

Wenzel, Joseph
<person> German anatomist and physiologist, 1768-1808. ... See: Wenzel's ventricle. ... (05 Mar 2000) ...

Wenzel's ventricle
Synonym for cavity of septum pellucidum ... A slitlike, fluid-filled space of variable width between the left and right transparent septum, which occurs in less than 10% of human brains and may communicate with the third ventricle. ... Synonym: cavum septi pellucidi, Duncan's ventricle, fifth ventricle, pseudocele, pseudoventricle, sylvian ventricle, …

Wepfer, Johann
<person> 1620-1695. ... See: Wepfer's glands. ... (05 Mar 2000) ...

Wepfer's glands
Synonym for duodenal glands ... Small, branched, coiled tubular glands that occur mostly in the submucosa of the first third of the duodenum; they secrete an alkaline mucoid substance that serves to neutralise gastric juice. ... Synonym: glandulae duodenales, Brunner's glands, Wepfer's glands. ... (05 Mar 2000) ...

werdnig-hoffmann disease
A recessively inherited acute infantile form of motor neuropathy with proximal muscle wasting particularly of the upper extremities. The chronic childhood form may be an arrested werdnig-hoffmann disorder. ... (12 Dec 1998) ...

Werdnig-Hoffmann muscular atrophy
Synonym for infantile spinal muscular atrophy ... Transmitted as autosomal recessive on chromosome 5q. Progressive dysfunction of the anterior horn cells in the spinal cord and brainstem cranial nerves with profound weakness and bulbar dysfunction occurring in the first two years of life. Three groups, based on age of clinical onset, are recognised. …

Werdnig, Guido
<person> Austrian neurologist, 1862-1919. ... See: Werdnig-Hoffmann disease, Werdnig-Hoffmann muscular atrophy. ... (05 Mar 2000) ...

Werlhof, Paul
<person> German physician, 1699-1767. ... See: Werlhof's disease. ... (05 Mar 2000) ...

Werlhof's disease
An obsolete term for idiopathic thrombocytopenic purpura. ... (05 Mar 2000) ...

Wermer's syndrome
<syndrome> This is a hereditary disorder in which two or more of the following glands: parathyroid, pancreas, pituitary, adrenals or thyroid develop hyperplasia or a tumour. ... (27 Sep 1997) ...

Wernekinck, Friedrich
<person> German anatomist and physician, 1798-1835. ... See: Wernekinck's commissure, Wernekinck's decussation. ... (05 Mar 2000) ...

Wernekinck's commissure
The decussation of the brachia conjunctiva before their entrance into the red nucleus of the tegmentum. ... (05 Mar 2000) ...

Wernekinck's decussation
Synonym for decussation of superior cerebellar peduncles ... The decussation of the left and right superior cerebellar peduncles in the tegmentum of the caudal mesencephalon. ... Synonym: decussatio pedunculorum cerebellarium superiorum, decussatio brachii conjunctivi, decussation of brachia conjunctiva, Wernekinck's decussation. ... (05 Mar 2000) ...

werner syndrome
<radiology> Cataract in connection with scleroderma, rare; unknown aetiology, M = F, premature aging, short stature, thin, atrophic extremities, generalised osteoporosis, accelerated atherosclerosis (calcification of arteries, heart valves), beaked nose, multiple infections (including osteomyelitis), scleroderma-like skin changes, increased i …

werner-his disease
Named for the German physician heinrich werner (not the werner of werner's syndrome) and the swiss physician wilhelm his, jr. (who described the bundle of his in the heart). See fever, wolhynia. ... (12 Dec 1998) ...

Werner, F
<person> Early 20th century German chemist. ... See: Werner's test. ... (05 Mar 2000) ...

Werner, Otto
<person> German physician, *1879. ... See: Werner's syndrome. ... (05 Mar 2000) ...

Werner's syndrome
<syndrome> A disorder consisting of scleroderma-like skin changes, bilateral juvenile cataracts, progeria, hypogonadism, and diabetes mellitus; autosomal recessive inheritance. ... (05 Mar 2000) ...

Werner's test
Synonym for thyroid suppression test ... A thyroid function test used to diagnose difficult cases of hyperthyroidism, now largely replaced by the thyrotropin-releasing hormone stimulation test; triiodothyronine is administered for a week to 10 days, and a reduction of its uptake by the thyroid gland to less than half of the initial uptake is a norma …

Wernicke-Korsakoff encephalopathy
See: Wernicke's syndrome, Korsakoff's syndrome. ... (05 Mar 2000) ...

Wernicke-Korsakoff syndrome
<syndrome> The coexistence of Wernicke's and Korsakoff's syndrome's. ... (05 Mar 2000) ...

Wernicke, Karl
<person> German neurologist, 1848-1905. ... See: Wernicke's aphasia, Wernicke's area, Wernicke's centre, Wernicke's disease, Wernicke's encephalopathy, Wernicke's field, Wernicke's radiation, Wernicke's reaction, Wernicke's region, Wernicke's sign, Wernicke's syndrome, Wernicke's zone, Wernicke-Korsakoff encephalopathy, Wernicke-Korsakoff synd …

Wernicke's aphasia
Synonym for sensory aphasia ... Aphasia in which there is impairment in the comprehension of spoken and written words, associated with effortless, articulated, but paraphrasic, speech and writing; malformed words, substitute words, and enologisms are charcteristic. When severe, and speech is incomprehensible, it is called jargon aphasia. The patient …

Wernicke's area
Synonym for Wernicke's centre ... The region of the cerebral cortex thought to be essential for understanding and formulating coherent, propositional speech; it encompasses a large region of the parietal and temporal lobes near the lateral sulcus of the left cerebral hemisphere; corresponding approximately to Brodmann's areas 40, 39, and 22. ... Syno …