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

vehicles
A carrier or inert medium used as a solvent (or diluent) in which the medicinally active agent is formulated and or administered. ... (12 Dec 1998) ...

veil
1. Something hung up, or spread out, to intercept the view, and hide an object; a cover; a curtain; especially, a screen, usually of gauze, crape, or similar diaphnous material, to hide or protect the face. 'The veil of the temple was rent in twain.' (Matt. Xxvii. 51) 'She, as a veil down to the slender waist, Her unadorned golden tresses wore.' (M …

veil cell
An antigen-presenting cell that has veil-like cytoplasmic processes and circulates in the blood and lymph. ... Synonym: veiled cells. ... (05 Mar 2000) ...

veiled cell
A cell type found in afferent lymph and defined (rather unsatisfactorily) on the basis of its morphology. Probably an accessory cell migrating from the periphery (where it is referred to as a Langerhans cell if in the skin) to the draining lymph node. In the lymph node known as an interdigitating cell and found in the T dependent areas of spleen or …

veiled cells
Synonym for veil cell ... An antigen-presenting cell that has veil-like cytoplasmic processes and circulates in the blood and lymph. ... Synonym: veiled cells. ... (05 Mar 2000) ...

veiling glare
Synonym for blinding glare ... Glare resulting from excessive illumination. ... Synonym: veiling glare. ... (05 Mar 2000) ...

veillonella
A genus of gram-negative, anaerobic cocci parasitic in the mouth and in the intestinal and respiratory tracts of man and other animals. ... (12 Dec 1998) ...

Veillonella alcalescens alcalescens
A subspecies found primarily in the mouth of humans but occasionally in the buccal cavity of rabbits and rats; it is the type subspecies of the species Veillonella alcalescens. ... (05 Mar 2000) ...

Veillonella alcalescens criceti
A subspecies found in the mouth of hamsters. ... (05 Mar 2000) ...

Veillonella alcalescens dispar
A subspecies found in the mouth and respiratory tract of humans. ... (05 Mar 2000) ...

Veillonella alcalescens ratti
A subspecies found in the mouth and intestinal contents of rats. ... (05 Mar 2000) ...

Veillonella alcalesens
A species found in the saliva of humans and other animals. ... (05 Mar 2000) ...

Veillonella atypica
Synonym for Veillonella parvula atypica ... A subspecies found in the buccal cavity of rats and humans. ... Synonym: Veillonella atypica. ... (05 Mar 2000) ...

Veillonella parvula
A species found normally as a harmless parasite in the natural cavities, especially the mouth and digestive tract, of humans and other animals; it is the types species of the genus Veillonella. ... (05 Mar 2000) ...

Veillonella parvula atypica
A subspecies found in the buccal cavity of rats and humans. ... Synonym: Veillonella atypica. ... (05 Mar 2000) ...

Veillonella parvula parvula
A subspecies found in the mouth or the intestinal or respiratory tract of humans; it is the type subspecies of the species Veillonella parvula. ... (05 Mar 2000) ...

Veillonella parvula rodentium
A subspecies found in the buccal cavity and intestinal tract of hamsters, rats, and rabbits. ... Synonym: Veillonella rodentium. ... (05 Mar 2000) ...

Veillonella rodentium
Synonym for Veillonella parvula rodentium ... A subspecies found in the buccal cavity and intestinal tract of hamsters, rats, and rabbits. ... Synonym: Veillonella rodentium. ... (05 Mar 2000) ...

veillonellaceae
A family of gram-negative bacteria that are parasites of warm-blooded animals such as man, ruminants, rodents and pigs, particularly in the alimentary tract. ... (12 Dec 1998) ...

vein
1. Blood vessel that returns blood from the microvasculature to the heart, walls thinner and less elastic than those of artery. ... 2. In leaves, thickened portion of leaf containing vascular bundle, the pattern, venation, is characteristic for each species. ... (18 Nov 1997) ...

vein of bulb of penis
A tributary of the internal pudendal vein that drains the bulb of the penis. ... Synonym: vena bulbi penis. ... (05 Mar 2000) ...

vein of cochlear aqueduct
Synonym for vein of cochlear canaliculus ... It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. ... Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. ... (05 Mar 2000) ...

vein of cochlear canaliculus
It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. ... Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. ... (05 Mar 2000) ...

vein of corpus striatum
Synonym for superior thalamostriate vein ... <anatomy, vein> A long vein passing forward in the groove between the thalamus and caudate nucleus, covered by the lamina affixa, receiving the transverse caudate veins along its lateral side, and joining at the caudal wall of Monro's foramen with the choroidal vein and vein of septum pellucidum to …

vein of galen aneurysm
<radiology> Really AVM, not aneurysm, AVM of posterior choroidal branches of PCA, with or without congestive heart failure due to AV shunting (left to right), predominantly right-sided cardiomegaly, wide superior mediastinum, retrosternal fullness, cervical trachea displaced anteriorly ... (12 Dec 1998) ...

vein of olfactory gyrus
Synonym for vena gyri olfactorii ... A tributary of the basal vein which drains the medial olfactory stria. ... Synonym: vein of olfactory gyrus. ... (05 Mar 2000) ...

vein of posterior horn
Synonym for vena cornus posterioris ... A small vein draining the surface region of the posterior horn of the lateral ventricle; it is a tributary to the great cerebral vein. ... Synonym: vein of posterior horn. ... (05 Mar 2000) ...

vein of pterygoid canal
A vein accompanying the nerve and artery through the pterygoid canal and emptying into the pharyngeal venous plexus. ... Synonym: vena canalis pterygoidei, vidian vein. ... (05 Mar 2000) ...

vein of septum pellucidum
See: anterior vein of septum pellucidum, posterior vein of septum pellucidum. ... (05 Mar 2000) ...

vein of uncus
Synonym for vena unci ... A vein draining the uncus into the inferior cerebral vein of the same side. ... Synonym: vein of uncus. ... (05 Mar 2000) ...

vein of vestibular aqueduct
A small vein accompanying the endolymphatic duct; it drains much of the vestibular portion of the labyrinth and terminates in the inferior petrosal sinus. ... Synonym: vena aqueductus vestibuli. ... (05 Mar 2000) ...

vein of vestibular bulb
The vein draining the bulb of the vestibule; a tributary of the internal pudendal vein. ... Synonym: vena bulbi vestibuli. ... (05 Mar 2000) ...

vein stone
Synonym for phlebolith ... <cardiology, pathology> A concretion or stone within a cardiovascular vein. ... Origin: Gr. Phlebos = vein. ... (11 Jun 1998) ...

vein stripper
An instrument used to remove a vein by tying the vein at one end and pulling it, tearing its branches, and thus, stripping it out of the body. ... (05 Mar 2000) ...

vein, pulmonary
One of four vessels that carry aerated blood from the lungs to the right atrium of the heart. (the four are the right and left superior and inferior pulmonary veins). The pulmonary veins are the only veins that carry bright red oxygenated blood. ... (12 Dec 1998) ...

veinobiase
<chemical> Effervescent tablets containing anthocyanoside extracts of ribes nigrum, saponoside extracts of ruscus, ascorbic acid and lithium carbonate ... Pharmacological action: cardiovascular agent ... Chemical name: veinobiase ... (26 Jun 1999) ...

veins
The vessels carrying blood toward the heart. ... (12 Dec 1998) ...

veins of caudate nucleus
Synonym for venae nuclei caudati ... Small veins from the caudate nucleus draining into the superior thalamostriate vein. ... Synonym: veins of caudate nucleus. ... (05 Mar 2000) ...

veins of cerebellum
Synonym for cerebellar veins ... The veins draining the cerebellum. ... See: inferior veins of cerebellar hemisphere, superior veins of cerebellar hemisphere, petrosal vein, precentral cerebellar vein, inferior vein of vermis, superior vein of vermis. ... Synonym: venae cerebelli, veins of cerebellum. ... (05 Mar 2000) ...

veins of eyelids
Synonym for palpebral veins ... Veins draining the superior eyelid posteriorly as tributaries of the superior ophthalmic vein. ... Synonym: venae palpebrales, veins of eyelids. ... (05 Mar 2000) ...

veins of Galen
Synonym for internal cerebral veins ... Paired veins passing caudally near the midline in the tela choroidea of the third ventricle, formed by the union of the choroid vein, thalamostriate (terminal) vein, and vein of septum pellucidum, and uniting caudally so as to form the great cerebral vein. ... Synonym: venae cerebri internae, veins of Galen. …

veins of inferior eyelid
Synonym for inferior palpebral veins ... Veins of inferior eyelid; veins originatin gin the inferior eyelid and emptying into the angular vein. ... Synonym: venae palpebrales inferiores, veins of inferior eyelid. ... (05 Mar 2000) ...

veins of kidney
The tributaries of the renal vein that drain the kidney; they parallel the arteries in the kidney and consist of interlobular, arcuate, and interlobar veins. ... Synonym: venae renis. ... (05 Mar 2000) ...

veins of knee
The veins that accompany the genicular arteries; they drain blood from the structures around the knee, terminating in the popliteal vein. ... Synonym: venae genus. ... (05 Mar 2000) ...

veins of medulla oblongata
Synonym for venae medullae oblongatae ... Several veins draining the medulla oblongata; they are tributaries of the anterior spinal vein and the petrosal vein. ... Synonym: veins of medulla oblongata. ... (05 Mar 2000) ...

veins of pons
Synonym for pontine veins ... Several veins running transversely on the pons to join the petrosal vein. ... Synonym: venae pontis, veins of pons. ... (05 Mar 2000) ...

veins of superior eyelid
Synonym for superior palpebral veins ... Veins draining the superior eyelid anteriorly into the angular vein. ... Synonym: venae palpebrales superiores, veins of superior eyelid. ... (05 Mar 2000) ...

veins of temporomandibular joint
Several small tributaries to the retromandibular vein from the temporomandibular joint. ... Synonym: venae articulares temporomandibulares. ... (05 Mar 2000) ...

veins of vertebral column
Includes the internal and external vertebral venous plexuses, the basivertebral veins, and the anterior and posterior spinal veins. ... Synonym: venae columnae vertebralis. ... (05 Mar 2000) ...

Vejovis
A genus of scorpions (the so-called devil scorpions of North America), including Vejovis spinigerus, the stripe-tailed devil scorpion; Vejovis carolinianus, the southern devil scorpion; and Vejovis flavus, the slender devil scorpion. ... (05 Mar 2000) ...

vela
Plural of velum. ... (05 Mar 2000) ...

velamen
A water-retaining outer layer of the aerial roots of some epiphytes, especially orchids. ... (09 Oct 1997) ...

velamen vulvae
Hypertrophy of the labia minora. ... (05 Mar 2000) ...

velamentous
Expanded in the form of a sheet or veil. ... Synonym: veliform. ... (05 Mar 2000) ...

velamentous insertion
A form of insertion of the foetal blood vessels into the placenta, in which the vessels separate before reaching the placenta and develop toward it in a fold of amnion, somewhat like the ribs of an open parasol. ... Synonym: parasol insertion. ... (05 Mar 2000) ...

velamentum
Synonym: velum. ... Origin: L. A cover ... (05 Mar 2000) ...

velamina
Plural of velamen. ... (05 Mar 2000) ...

veldt disease
Synonym for heartwater ... An acute febrile disease of cattle, sheep, and goats in sub-Saharan Africa and certain islands in the Indian and Atlantic Oceans and in the Caribbean, caused by the rickettsial organism Cowdria ruminantium and transmitted by ticks of the genus Amblyomma; some species of African antelope and European and American deer also …

veldt sore
Synonym for desert sore ... Any of a variety of chronic non-specific cutaneous ulcers, most commonly on the shins, knees, hands, and forearms, and probably a variant of ecthyma, that occur in tropical and desert areas. ... Synonym: Barcoo rot, veldt sore. ... (05 Mar 2000) ...

velella
<zoology> Any species of oceanic Siphonophora belonging to the genus Velella. ... These creatures are brilliantly coloured and float at the surface of the sea. They have an oblong, disklike body, supported by a thin chitinous plate, from which rises a thin diagonal crest which acts as a sail. The feeding and reproductive zooids hang down from …

veliform
Synonym: velamentous. ... Origin: L. Velum, veil, + forma, form ... (05 Mar 2000) ...

Vella, Luigi
<person> Italian physiologist, 1825-1886. ... See: Vella's fistula, Thiry-Vella fistula. ... (05 Mar 2000) ...

Vella's fistula
Synonym for Thiry-Vella fistula ... Experimental isolation of a segment of intestine in a dog or other animal; the mesenteric attachment is preserved, the divided intestine at each end of the segment is joined by anastomosis, and the ends of the segment are stitched to openings in the abdominal wall. ... Synonym: Vella's fistula. ... (05 Mar 2000) ...

vellicate
To twitch or contract spasmodically; said especially of fibrillary muscular spasms. ... Origin: L. Vellico, pp. -atus, to pluck, to twitch, fr. Vello, to deprive of hair, pluck ... (05 Mar 2000) ...

vellus
1. Fine nonpigmented hair covering most of the body. ... 2. A structure that is fleecy or soft and woolly in appearance. ... Origin: L. Fleece ... Vellus olivae inferioris, a stratum of nerve fibres surrounding the inferior olive. ... (05 Mar 2000) ...

vellus hair
Colourless, soft, fine postnatal to adult hair. ... (05 Mar 2000) ...

velo-cardio-facial syndrome
<syndrome> Also known as shprintzen syndrome, this more than is a congenital malformation (birth defect) syndrome with cleft palate, heart defect, abnormal face, and learning problems. The condition is therefore called the velo-cardio-facial (vcf) syndrome. (the velum is the soft palate). Other less frequent features include short stature, sm …

velocity
The time rate of motion, the distance traveled divided by the time required to travel that distance. ... (09 Oct 1997) ...

velocity coefficient
The rate of transformation of a unit mass of substance in a chemical reaction. ... (05 Mar 2000) ...

velocity constants
Synonym for rate constants ... Proportionality constants equal to the initial rate of a reaction divided by the concentration of the reactant(s); e.g., in the reaction A &rarr; B + C, the rate of the reaction equals -d[A]/dt = k1[A]. The rate constant k1 is a unimolecular rate constant since there is only one molecular species reacting and has u …

velocity space
<radiobiology> Mathematical space where each point corresponds not to a certain location in reality, but to a certain velocity. Distribution functions typically involve mixes of both position and velocity spaces. (See distribution function.) Contrast with position space where each point corresponds to a given location. ... (09 Oct 1997) ...

velocity space instability
<radiobiology> A class of instabilities driven by particle distributions (in velocity space) which are not in thermal equilibrium. ... (09 Oct 1997) ...

velogenic
Denoting the virulence of a virus capable of inducing, after a brief incubation period, a fulminating and often lethal disease in embryonic, immature, and adult hosts; used in characterizing Newcastle disease virus. ... Origin: L. Velox, rapid, + G. -gen, producing ... (05 Mar 2000) ...

velonoskiascopy
An obsolete subjective test for ametropia in which a thin rod is moved across the pupil while a distant light source is fixed; the shadow of the rod moves with the rod in myopia, and in the opposite direction in hyperopia. ... Origin: G. Velone (belone), needle, + skiascopy ... (05 Mar 2000) ...

velopharyngeal
Pertaining to the soft palate (velum palatinum) and the posterior nasopharyngeal wall. ... (05 Mar 2000) ...

velopharyngeal closure
The apposition of the palate to the upper posterior pharyngeal wall as in deglutition and in some speech sounds. ... (05 Mar 2000) ...

velopharyngeal insufficiency
Failure of the soft palate to reach the posterior pharyngeal wall. It may be caused by cleft palate surgery, palatal or pharyngeal abnormalities or injury, or neuromuscular dysfunction of the velopharyngeal sphincter. It causes hypernasality of speech. ... (12 Dec 1998) ...

velopharyngeal seal
Closure between the oral and nasopharyngeal cavities. ... (05 Mar 2000) ...

velopharyngeal sphincter
Synonym for palatopharyngeal sphincter ... A constant band of the superior pharyngeal constrictor muscle which sweeps posteriorly from the anterolateral part of the superior surface of the palatine aponeurosis. It creates a visible ridge when the superior constrictor is contracted, meeting the elevated soft palate to seal off the pharyngeal isthmus …

velosynthesis
Synonym for palatorrhaphy ... Suture of a cleft palate. ... Synonym: staphylorrhaphy, uraniscorrhaphy, uranorrhaphy, velosynthesis. ... Origin: palato-+ G. Rhaphe, suture ... (05 Mar 2000) ...

Velpeau, Alfred
<person> French surgeon, 1795-1867. ... See: Velpeau's bandage, Velpeau's canal, Velpeau's fossa, Velpeau's hernia. ... (05 Mar 2000) ...

Velpeau's bandage
A bandage which serves to immobilise arm to chest wall, with the forearm positioned obliquely across and upward on front of chest. ... (05 Mar 2000) ...

Velpeau's canal
Synonym for inguinal canal ... A passage in the lower anterior abdominal wall which in the male allows passage of the spermatic cord and in the female contains the round ligament. Because of the weakness it creates in the abdominal wall, it is the most frequent site for a hernia. ... (12 Dec 1998) ...

Velpeau's fossa
Synonym for ischiorectal fossa ... A wedge-shaped space with its base toward the perineum and lying between the tuberosity of the ischium and the obturator internus muscle laterally and the external anal sphincter and the levator ani muscle medially. ... Synonym: fossa ischiorectalis, ischioanal fossa, Velpeau's fossa. ... (05 Mar 2000) ...

Velpeau's hernia
Femoral hernia in which the intestine is in front of the blood vessels. ... (05 Mar 2000) ...

velum
A membranous covering, a veil. ... (09 Oct 1997) ...

velum interpositum
Synonym for choroid tela of third ventricle ... A double fold of pia mater, enclosing subarachnoid trabeculae, between the fornix above and the epithelial roof of the third ventricle and the thalami below; at each lateral margin is a vascular fringe projecting into the choroidal fissure of the lateral ventricle; on its undersurface are several small …

velum medullare inferius
Synonym for inferior medullary velum ... A thin sheet of white matter, hidden by the cerebellar tonsil, attached along the peduncle of the flocculus and, at and near the midline, to the nodulus of the vermis; it is continuous caudally with the epithelial lamina and choroid plexus of the fourth ventricle. ... Synonym: velum medullare inferius, posteri …

velum medullare superius
Synonym for superior medullary velum ... The thin layer of white matter stretching between the two superior cerebellar peduncles, forming the roof of the superior recess of the fourth ventricle. ... Synonym: velum medullare superius, anterior medullary velum, Vieussens' valve. ... (05 Mar 2000) ...

velum palatinum
An alternate term for soft palate, soft palate. ... (05 Mar 2000) ...

velum pendulum palati
Synonym for soft palate ... The muscular part of the roof of the mouth. The soft palate is directly behind the hard palate. It lacks bone and so is soft. ... (12 Dec 1998) ...

velum semilunare
Synonym for inferior medullary velum ... A thin sheet of white matter, hidden by the cerebellar tonsil, attached along the peduncle of the flocculus and, at and near the midline, to the nodulus of the vermis; it is continuous caudally with the epithelial lamina and choroid plexus of the fourth ventricle. ... Synonym: velum medullare inferius, posteri …

velum tarini
Synonym for inferior medullary velum ... A thin sheet of white matter, hidden by the cerebellar tonsil, attached along the peduncle of the flocculus and, at and near the midline, to the nodulus of the vermis; it is continuous caudally with the epithelial lamina and choroid plexus of the fourth ventricle. ... Synonym: velum medullare inferius, posteri …

velum terminale
Synonym for lamina terminalis of cerebrum ... A thin plate passing upward from the optic chiasm and forming the rostral boundary of the third ventricle; membrane closing the rostral neuropore. ... Synonym: lamina terminalis cerebri, lamina cinerea, terminal plate, velum terminale. ... (05 Mar 2000) ...

velum transversum
Synonym for transverse velum ... A fold in the dorsal wall of the embryonic brain at the boundary between the telencephalon and diencephalon. ... Synonym: velum transversum. ... (05 Mar 2000) ...

velum triangulare
Synonym for choroid tela of third ventricle ... A double fold of pia mater, enclosing subarachnoid trabeculae, between the fornix above and the epithelial roof of the third ventricle and the thalami below; at each lateral margin is a vascular fringe projecting into the choroidal fissure of the lateral ventricle; on its undersurface are several small …

velvet
1. A silk fabric, having a short, close nap of erect threads. Inferior qualities are made with a silk pile on a cotton or linen back. ... 2. The soft and highly vascular deciduous skin which envelops and nourishes the antlers of deer during their rapid growth. Cotton velvet, an imitation of velvet, made of cotton. Velvet cork, the best kind of cork …

velvet ant
A wingless mutilid wasp (family Mutilidae, order Hymenoptera) known for its venomous sting. ... (05 Mar 2000) ...

velvet ant stings
Common in most parts of the world including the southern and southwestern united states, velvet ants are not true ants but rather parasitic wasps. Their sting like that of other wasps, fire ants, bees, yellow jackets, and hornets -- can trigger allergic reactions varying greatly in severity. Avoidance and prompt treatment are essential. In selected …

vena
<anatomy> Any one of the great systemic veins connected directly with the heart. Vena contracta. The portal vein of the liver. ... A vein. Vena cava. ... Origin: L, literally, contracted vein, hollow vein. ... (11 Mar 1998) ...