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

right main bronchus
It arises at the bifurcation of the trachea and enters the hilum of the right lung, giving off the superior lobe bronchus and continuing downward to give off the middle and inferior lobe bronchi. It is shorter, of greater caliber, and more nearly-vertical than the left main bronchus, thus, aspirated objects more frequently lodge on the right side.< …

right margin of heart
Synonym for right border of heart ... The border between the sternocostal and diaphragmatic surfaces of the heart; it is fairly well defined in fixed hearts but is rounded and indefinite in the living heart. ... Synonym: margo dexter cordis, right margin of heart. ... (05 Mar 2000) ...

right middle lobe syndrome
<radiology> Controversial, associated with asthma, cough, wheezing, recurrent pneumonia, XR findings: total or partial RML atelectasis, with or without bronchial narrowing ... (12 Dec 1998) ...

right ovarian vein
<anatomy, vein> Begins as the pampiniform plexus at the hilum of the ovary and opens into the inferior vena cava. ... Synonym: vena ovarica dextra. ... (05 Mar 2000) ...

right ovarian vein syndrome
<syndrome> A condition characterised by intermittent abdominal pain due to ureteral compression by the right ovarian vein, occurring with most frequency on the right side, and thought to be due to aberrant crossing of the right ovarian vein over the ureter, generally at the level of the first sacral vertebra; dilation of the ovarian vein duri …

right parasternal impulses
Cardiac activity as palpable or recordable just to the right of the sternum. ... (05 Mar 2000) ...

right pulmonary artery
<anatomy, artery> The longer of the two terminal branches of the pulmonary trunk, it passes transversely across the mediastinum passing inferior to the aortic arch to enter the hilum of the right lung. Branches are distributed with the bronchi; frequent variations occurs. Typical branches to the superior lobe (rami lobi superioris ) are apica …

right sagittal fissure
A sagittal groove on the undersurface of the liver formed by the fossa vesicae felleae anteriorly and the sulcus venae cavae posteriorly. ... (05 Mar 2000) ...

right splicing junction
Boundary between the right end of an intron and the left end of the adjacent exon. ... Synonym: acceptor splicing site. ... (05 Mar 2000) ...

right superior intercostal vein
<anatomy, vein> A tributary of the azygos vein formed by the union of the right second, third, and fourth posterior intercostal veins. ... Synonym: vena intercostalis superior dextra. ... (05 Mar 2000) ...

right superior pulmonary vein
<anatomy, vein> The vein returning oxygenated blood from the superior and middle lobes of the right lung to the left atrium. ... Synonym: vena pulmonalis superior dextra. ... (05 Mar 2000) ...

right suprarenal vein
<anatomy, vein> The short vein that passes from the hilum of the right suprarenal to the inferior vena cava. ... Synonym: vena suprarenalis dextra. ... (05 Mar 2000) ...

right testicular vein
<anatomy, vein> Begins as the pampiniform plexus and ascends to joint the inferior vena cava. ... Synonym: vena testicularis dextra. ... (05 Mar 2000) ...

right to die
The right of the patient or the patient's representative to make decisions with regard to the patient's dying. ... (12 Dec 1998) ...

right triangular ligament
<anatomy> A triangular fold of peritoneum that passes from the right lobe of the liver to the diaphragm; it is a formation of the coronary ligament, formed as the coronary ligament makes an acute angle upon reaching its most lateral point on the right side as it surrounds the bare area of the liver. ... Synonym: ligamentum triangulare dextrum. …

right ventricle
The muscular chamber of the heart which accepts blood from the right atrium and pumps it through the pulmonary artery into the lungs. ... (27 Sep 1997) ...

right ventricular failure
An weakening of the right ventricle that results in the back up of blood in the venous system, liver, gastrointestinal tract and extremities. The causes of this condition include left-sided congestive heart failure, emphysema, valvular heart disease, cardiomyopathy, anaemia, hyperthyroidism, cor pulmonale and congenital heart disease. Risk factors …

right ventricular hypertrophy
<radiology> Pulmonary valve stenosis, pulmonary hypertension, tetralogy of Fallot, VSD ... (12 Dec 1998) ...

right ventricular hypoplasia
Synonym for parchment heart ... A congenital or acquired condition in which there is thinning of the right ventricular myocardium. ... Synonym: right ventricular hypoplasia. ... (05 Mar 2000) ...

right ventricular volume overload
<radiology> Atrial septal defect, partial/total APVR, tricuspid insufficiency, pulmonary insufficiency, congenital/aquired absence of pericardium, Ebstein anomaly (not truly RV) ... (12 Dec 1998) ...

right whale
<zoology> The bowhead, Arctic, or Greenland whale (Balaena mysticetus), from whose mouth the best whalebone is obtained. ... Any other whale that produces valuable whalebone, as the Atlantic, or Biscay, right whale (Balaena cisarctica), and the Pacific right whale (B. Sieboldii); a bone whale. ... <zoology> Pygmy right whale, a small New …

right-eyed
Synonym for dextrocular ... Rarely used term for indicating right ocular dominance; denoting one who prefers the right eye in monocular work, such as microscopy. ... Synonym: right-eyed. ... Origin: dextro-+ L. Oculus, eye ... (05 Mar 2000) ...

right-footed
Synonym for dextropedal ... Denoting one who uses the right leg in preference to the left. ... Synonym: right-footed. ... Origin: dextro-+ L. Pes (ped-), foot ... (05 Mar 2000) ...

right-handed
1. Using the right hand habitually, or more easily or skillful than the left. ... 2. Having the same direction or course as the movement of the hands of a watch seen in front; said of the motion of a revolving object looked at from a given direction. ... 3. <marine biology> Having the whorls rising from left to right; dextral; said of spiral sh …

right-to-left shunt
The passage of blood from the right side of the heart into the left (as through a septal defect), or from the pulmonary artery into the aorta (as through a patent ductus arteriosus); such a shunt can occur only when the pressure on the right side exceeds that in the left, as in advanced pulmonic stenosis, or when the pulmonary artery pressure excee …

righteousness
1. The quality or state of being righteous; holiness; purity; uprightness; rectitude. ... Righteousness, as used in Scripture and theology, in which it chiefly occurs, is nearly equivalent to holiness, comprehending holy principles and affections of heart, and conformity of life to the divine law. ... 2. A righteous act, or righteous quality. 'All ou …

righting reflexes
Reflex's which through various receptors, in labyrinth, eyes, muscles, or skin, tend to bring an animal's body into its normal position in space and which resist any force acting to put it into a false position, e.g., on its back. ... See: body righting reflexes, labyrinthine righting reflexes, neck reflexes, optical righting reflexes. ... Synonym: s …

rigid dysarthria
Synonym for spastic dysarthria ... Dysarthria caused by lesions along the corticobulbar tracts. ... Synonym: rigid dysarthria. ... (05 Mar 2000) ...

rigidity
Stiffness or inflexibility, chiefly that which is abnormal or morbid, rigor. ... Origin: L. Rigiditas, rigidus = stiff ... (18 Nov 1997) ...

rigler sign
<radiology> Bowel wall outlined by air on inside and outside, indicates pneumoperitoneum ... (12 Dec 1998) ...

rigor
Stiffening of muscle as a result of high calcium levels and ATP depletion, so that actin myosin links are made, but not broken. ... (18 Nov 1997) ...

rigor mortis
Muscular rigidity which develops in the cadaver usually from 4 to 10 hours after death and lasts 3 or 4 days. ... (12 Dec 1998) ...

riley-day syndrome
<radiology> Familial dysautonomia, autosomal recessive, seen in Jewish infants, malfunction of autonomic nervous system, possibly associated with catecholamine release and beta-NGF, hypersecretion of mucous glands, XR resembles cystic fibrosis ... (12 Dec 1998) ...

Riley, Conrad
<person> U.S. Paediatrician, *1913. ... See: Riley-Day syndrome. ... (05 Mar 2000) ...

Riley, Harris Jr
<person> 20th century U.S. Physician. ... See: Smith-Riley syndrome. ... (05 Mar 2000) ...

riluzole
<chemical> A glutamate antagonist that has reported anticonvulsant activity. It has been shown to prolong the survival of patients with amyotrophic lateral sclerosis and has been approved in the united states to treat patients with als. ... Pharmacological action: anaesthetics, anticonvulsants, excitatory amino acid antagonists, neuroprotectiv …

rima glottidis
The interval between the true vocal cords. ... Synonym: glottis vera, rima vocalis, true glottis. ... (05 Mar 2000) ...

rima oris
The mouth slit; the aperture of the mouth. ... Synonym: oral fissure. ... (05 Mar 2000) ...

rima palpebrarum
The lid slit, or fissure between the eye lids. ... Synonym: palpebral fissure. ... (05 Mar 2000) ...

rima pudendi
Synonym for pudendal cleft ... The cleft between the labia majora. ... Synonym: rima pudendi, fissura pudendi, pudendal cleavage, pudendal slit, rima vulvae, urogenital cleft, vulvar slit. ... (05 Mar 2000) ...

rima respiratoria
Synonym for rima vestibuli ... The interval between the false vocal cords or vestibular folds. ... Synonym: false glottis, glottis spuria, rima respiratoria. ... (05 Mar 2000) ...

rima vestibuli
The interval between the false vocal cords or vestibular folds. ... Synonym: false glottis, glottis spuria, rima respiratoria. ... (05 Mar 2000) ...

rima vocalis
Synonym for rima glottidis ... The interval between the true vocal cords. ... Synonym: glottis vera, rima vocalis, true glottis. ... (05 Mar 2000) ...

rima vulvae
Synonym for pudendal cleft ... The cleft between the labia majora. ... Synonym: rima pudendi, fissura pudendi, pudendal cleavage, pudendal slit, rima vulvae, urogenital cleft, vulvar slit. ... (05 Mar 2000) ...

rimantadine
<chemical> An RNA synthesis inhibitor that is used as an antiviral agent in the prophylaxis and treatment of influenza. ... Pharmacological action: antiviral agents, nucleic acid synthesis inhibitors. ... Chemical name: Tricyclo(3.3.1.13,7)decane-1-methanamine, alpha-methyl- ... (12 Dec 1998) ...

Rimini's test
A test for formaldehyde in urine, milk, and other fluids, by the use of dilute solution of phenylhydrazine hydrochloride, sodium nitroprusside, and sodium hydroxide. ... (05 Mar 2000) ...

rimula
A minute slit or fissure. ... Origin: L. Dim. Of rima ... (05 Mar 2000) ...

rind
The external covering or coat, as of flesh, fruit, trees, etc.; skin; hide; bark; peel; shell. 'Thou canst not touch the freedom of my mind With all thy charms, although this corporal rind Thou hast immanacled.' (Milton) 'Sweetest nu hath sourest rind.' (Shak) ... Origin: AS. Rind bark, crust of bread; akin OHG. Rinta, G. Rinde, and probably to E. R …

rinderpest
A viral disease of cloven-hoofed animals caused by morbillivirus. It may be acute, subacute, or chronic with the major lesions characterised by inflammation and ulceration of the entire digestive tract. ... (12 Dec 1998) ...

rinderpest virus
A species of morbillivirus causing cattle plague, a disease with high mortality. Sheep, goats, pigs, and other animals of the order artiodactyla can also be infected. ... (12 Dec 1998) ...

Rindfleisch, Georg
<person> German physician, 1836-1908. ... See: Rindfleisch's cells, Rindfleisch's folds. ... (05 Mar 2000) ...

Rindfleisch's cells
An obsolete eponym for eosinophilic leukocyte. ... (05 Mar 2000) ...

Rindfleisch's folds
Semilunar fold's of the serous surface of the pericardium, embracing the beginning of the aorta. ... (05 Mar 2000) ...

ring
A circle, or a circular line, or anything in the form of a circular line or hoop. ... 2. Specifically, a circular ornament of gold or other precious material worn on the finger, or attached to the ear, the nose, or some other part of the person; as, a wedding ring. 'Upon his thumb he had of gold a ring.' (Chaucer) 'The dearest ring in Venice will I …

ring abscess
An acute purulent inflammation of the corneal periphery in which a necrotic area is surrounded by an annular girdle of leukocytic infiltration. ... (05 Mar 2000) ...

ring chromosome
A structurally abnormal chromosome in which the end of each chromosome arm has been lost and the broken arms have been reunited in ring formation. A ring chromosome is denoted by the symbol r. ... (12 Dec 1998) ...

ring chromosomes
Aberrant chromosomes with no ends. ... (12 Dec 1998) ...

ring compound
Synonym for cyclic compound ... Any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry where: 1) numerous compound's contain rings of carbon atoms (carbocyclic compound's) or carbon atoms plus one or more atoms of other types (heterocyclic compound's), usually nitrogen, oxygen, or sulfur; 2) w …

ring enhancement
In computed tomography, when a bright circle appears on an image made after injection of contrast medium, characteristic of localization of the contrast in the wall of an abscess. ... (05 Mar 2000) ...

ring finger
Fourth finger. ... Synonym: digitus annularis, fourth finger. ... (05 Mar 2000) ...

ring lesions in brain
<radiology> Hypodense, peripherally enhancing lesions, ** mnemonic: MAGIC DR., metastasis, abscess, glioma, granuloma, infarct, contusion, demyelination, resolving haematoma ... (12 Dec 1998) ...

ring ligament
Synonym for zona orbicularis ... Fibres of the articular capsule of the hip joint encircling the neck of the femur. ... Synonym: orbicular zone, ring ligament, zonular band. ... (05 Mar 2000) ...

ring of iris
Either of two zones on the anterior surface of the iris, separated by a circular line concentric with the pupillary border. ... Synonym: annulus iridis. ... (05 Mar 2000) ...

ring of Soemmerring
A mass of lenticular fibres enclosed between the anterior and posterior portion of the lenticular capsule, leaving the pupillary area relatively free. ... (05 Mar 2000) ...

ring pessary
A ring of rubber, plastic, or metal in which the cervix rests; designed to support the uterus and to correct prolapse of that organ. ... (05 Mar 2000) ...

ring precipitin test
A precipitin test in which antigen solution is carefully layered over antibody solution in a tube; as diffusion proceeds, a disk of precipitate forms where the antibody ratio is optimal. ... Synonym: ring test. ... (05 Mar 2000) ...

ring scotoma
An annular area of blindness in the visual field surrounding the fixation point in pigmentary degeneration of the retina and in glaucoma. ... (05 Mar 2000) ...

ring syringe
Synonym for control syringe ... A type of Luer-Lok syringe with thumb and finger rings attached to the proximal end of the barrel and to the tip of the plunger, allowing operation of the syringe with one hand. ... Synonym: ring syringe. ... (05 Mar 2000) ...

ring test
Synonym for ring precipitin test ... A precipitin test in which antigen solution is carefully layered over antibody solution in a tube; as diffusion proceeds, a disk of precipitate forms where the antibody ratio is optimal. ... Synonym: ring test. ... (05 Mar 2000) ...

ring ulcer of cornea
Inflammation of the greater part or the whole of the corneal periphery. ... (05 Mar 2000) ...

ring-knife
A circular or oval ring with internal cutting edge, on the model of the carpenter's spoke-shave, for shaving off tumours in the nasal and other cavities. ... Synonym: spoke-shave. ... (05 Mar 2000) ...

ring-like corneal dystrophy
Thread-like opacities of the anterior corneal stroma, with acute, painful onset followed by decreased vision; autosomal dominant inheritance. ... (05 Mar 2000) ...

ring-necked
<zoology> Having a well defined ring of colour around the neck. ... <zoology> Ring-necked duck, an American scaup duck (Aythya collaris). The head, neck, and breast of the adult male are black, and a narrow, but conspicuous, red ring encircles the neck. This ring is absent in the female. ... Synonym: ring-neck, ring-necked blackhead, ring …

ring-wall lesion
A small ring haemorrhage in the brain that stimulates proliferation of a glial ring. ... (05 Mar 2000) ...

ringed hair
A rare condition in which the hair shows alternate pigmented and bright segments, the latter due to air cavities within the cortex. ... Synonym: leukotrichia annularis, pili annulati, thrix annulata, trichonosus versicolor. ... (05 Mar 2000) ...

Ringer, Sydney
<person> English physiologist, 1835-1910. ... See: Ringer's injection, Ringer's solution, lactated Ringer's injection, Krebs-Ringer solution, Locke-Ringer solution. ... (05 Mar 2000) ...

Ringer's injection
A sterile solution of sodium chloride, potassium chloride, and calcium chloride, containing in each 100 ml between 820 and 900 mg of sodium chloride, between 25 and 35 mg of potassium chloride, and between 30 and 37 mg of calcium chloride; used intravenously as a fluid and electrolyte replenisher. ... (05 Mar 2000) ...

Ringer's solution
A solution resembling the blood serum in its salt constituents; it contains 8.6 g of NaCl, 0.3 g of KCl, and 0.33 g of CaCl2 in each 1000 ml of distilled water; used topically for burns and wounds, a salt solution usually used in combination with naturally occurring body substances (e.g., blood serum, tissue extracts) and/or more complex chemically …

ringneck
1. <zoology> Any one of several species of small plovers of the genus aegialitis, having a ring around the neck. The ring is black in summer, but becomes brown or gray in winter. The semipalmated plover (ae. Semipalmata) and the piping plover (ae. Meloda) are common North American species. ... Synonym: ring plover, and ring-necked plover. ... 2 …

ringworm
A fungal skin infection sometimes referred to as ringworm. Typically a scaly, red-shaped ring on the skin. Commonly seen in children. Treatment requires an antifungal cream such as clotrimazole or miconazole. ... (27 Sep 1997) ...

ringworm of beard
Synonym for tinea barbae ... Tinea of the beard, occurring as a follicular infection or as a granulomatous lesion; the primary lesions are papules and pustules. ... Synonym: barber's itch, folliculitis barbae, ringworm of beard, tinea sycosis, trichophytosis barbae. ... (05 Mar 2000) ...

ringworm of body
Synonym for tinea corporis ... A fungal skin infection sometimes referred to as ringworm. Typically a scaly, red-shaped ring on the skin. Commonly seen in children. Treatment requires an antifungal cream such as clotrimazole or miconazole. ... (27 Sep 1997) ...

ringworm of foot
Synonym for tinea pedis ... Tinea involving the feet, particularly the interdigital spaces and soles, most often caused by Trichophyton rubrum, T. Mentagrophytes or Epidermophyton floccosum and characterised by intensely pruritic lesions varying from mild, chronic and scaling to acute exfoliative, pustular and bullous. ... (18 Nov 1997) ...

ringworm of genitocrural region
Synonym for tinea cruris ... Tinea cruris is a fungal infection of the perineum, better known as jock itch. This condition is often treated with clotrimazole or miconazole cream. Good general hygiene is vital in the prevention of tinea cruris. Keep the groin area clean and dry and avoid chafing. Launder athletic supporters frequently. Use an antifun …

ringworm of nails
Synonym for onychomycosis ... A fungal infection that involves the fingernails. Nails generally split, flake and grow too thick. ... (27 Sep 1997) ...

ringworm of scalp
Synonym for tinea capitis ... <dermatology> A fungal scalp infection with a crusting and scaly lesion of the scalp that can also be associated with localised hair loss. Treatment requires oral (systemic) antifungal medications. ... (10 Jan 1998) ...

ringworm of the nails
The most common fungus infection of the nails (onychomycosis). Onychomycosis makes the nails look white and opaque, thickened, and brittle. Older women (perhaps because oestrogen deficiency may increase the risk of infection). And men and women with diabetes or disease of the small blood vessels (peripheral vacscular disease) are at increased risk. …

ringworm yaws
Round, scaling, and crusted lesions that resemble ringworm. ... (05 Mar 2000) ...

Rinne, Friedrich
<person> German otologist, 1819-1868. ... See: Rinne's test. ... (05 Mar 2000) ...

Rinne's test
As a positive test: a vibrating tuning fork is held in contact with the skull (usually the mastoid process) until the sound is lost, its prongs are then brought close to the auditory orifice when, if the hearing is normal, a faint sound will again be heard, as a negative test: a vibrating tuning fork is heard longer and louder when in contact with …

Riolan, Jean
<person> French anatomist and botanist, 1577-1657. ... See: Riolan's anastomosis, Riolan's arc, Riolan's arcades, Riolan's bones, Riolan's bouquet, Riolan's muscle. ... (05 Mar 2000) ...

Riolan's anastomosis
The specific portion of the marginal artery of the colon connecting the middle and left colic arteries. ... Synonym: Riolan's arc. ... (05 Mar 2000) ...

Riolan's arc
Synonym for intestinal arterial arcades ... The series of arterial arches formed in the mesentery by anastomoses between adjacent jejunal and ileal arteries and from which vasa recta arise. The arterial arcades of the ileum are shorter and more complex than those of the jejunum. ... See: arterial arches of ileum, arterial arches of jejunum. ... Synony …

Riolan's arcades
Synonym for intestinal arterial arcades ... The series of arterial arches formed in the mesentery by anastomoses between adjacent jejunal and ileal arteries and from which vasa recta arise. The arterial arcades of the ileum are shorter and more complex than those of the jejunum. ... See: arterial arches of ileum, arterial arches of jejunum. ... Synony …

Riolan's bones
Several small sutural bone's sometimes present in the petro-occipital suture. ... (05 Mar 2000) ...

Riolan's muscle
<anatomy> Marginal fibres of the palpebral part of the orbicularis oculi muscle. ... Synonym: cremaster muscle. ... (05 Mar 2000) ...

rioprostil
<chemical> (11 alpha,13e)-1,11,16-trihydroxy-16-methylprost-13-en-9-one. A synthetic methylprostaglandin e1 analog that reduces gastric acid secretion and enhances the gastric mucus-bicarbonate barrier. It is effective in the therapy of gastric ulcers and gives significant protection against nsaid-induced gastric mucosal damage. The drug also …

riot
1. To engage in riot; to act in an unrestrained or wanton manner; to indulge in excess of luxury, feasting, or the like; to revel; to run riot; to go to excess. 'Now he exact of all, wastes in delight, Riots in pleasure, and neglects the law.' (Daniel) 'No pulse that riots, and no blood that glows.' (Pope) ... 2. To disturb the peace; to raise an up …

riot control agents, chemical
Chemical substances which are employed during a riot in order to control or disperse the rioting parties. ... (12 Dec 1998) ...

riots
A form of violent crowd behaviour which expresses the emotional release of resentments and prejudices, usually relevant to grievances toward the social system. ... (12 Dec 1998) ...