| viral wart | A keratotic papilloma of the epidermis which occurs most frequently in young persons as a result of localised infection by human papilloma virus, usually types 2 and 4; the lesions are of variable duration, eventually undergoing spontaneous regression, and are both exophytic and endophytic, with hyperkeratosis, parakeratosis, hypergranulosis, koilocytosis, and papillomatosis. Synonym: common wart, infectious warts, verruca simplex, viral wart. (05 Mar 2000) |
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| Virchow's angle | An angle formed by the meeting of a line drawn from the middle of the nasofrontal suture to the base of the anterior nasal spine with a line drawn from this last point to the centre of the external auditory meatus. Synonym: Virchow-Holder angle. (05 Mar 2000) |
| Virchow's cells | The lacunae in osseous tissue containing the bone cell's; also the bone cell's themselves. Synonym: corneal corpuscles. (05 Mar 2000) |
| Virchow's corpuscles | Connective tissue cells found between the laminae of fibrous tissue in the cornea. Synonym: Toynbee's corpuscles, Virchow's cells, Virchow's corpuscles. (05 Mar 2000) |
| Virchow's crystals | Yellow-brown, amber, or burnt orange crystal's of haematoidin, frequently observed in extravasated blood in tissues. (05 Mar 2000) |
| Virchow's disease | A condition, either congenital or acquired, in which the head is abnormally large; usually applied to an adult skull with a capacity of over 1450 ml. Synonym: leontiasis ossea, macrocephaly, macrocephalia, megacephalia, megalocephaly, megalocephalia, Virchow's disease. Origin: mega-+ G. Kephale, head (05 Mar 2000) |
| Virchow's law | There is no special or distinctive neoplastic cell, inasmuch as the component cells of neoplasms originate from preexisting forms. (05 Mar 2000) |
| Virchow's node | A firm supraclavicular lymph node, especially on the left side, sufficiently enlarged that it is palpable from the cutaneous surface; such a lymph node is so termed because it may be the first recognised presumptive evidence of a malignant neoplasm in one of the viscera. A signal node that is known to contain a metastasis from a malignant neoplasm is sometimes designated by an old eponym, Troisier's ganglion. Synonym: jugular gland, Virchow's node. (05 Mar 2000) |
| Virchow's psammoma | <tumour> A firm cellular neoplasm derived from fibrous tissue of the meninges, choroid plexus, and certain other structures associated with the brain, characterised by the formation of multiple, discrete, concentrically laminated, calcareous bodies (psammoma bodies); most of these neoplasms are histologically benign, but may lead to severe symptoms as a result of compressing the brain. Synonym: angiolithic sarcoma, sand tumour, Virchow's psammoma. (05 Mar 2000) |
| Virchow, Rudolf | <person> German pathologist and politician, 1821-1902. See: Virchow's angle, Virchow's cells, Virchow's corpuscles, Virchow's crystals, Virchow's disease, Virchow's law, Virchow's node, Virchow's psammoma, Virchow-Holder angle, Virchow-Hassall bodies, Virchow-Robin space. (05 Mar 2000) |
| Virchow-Hassall bodies | Small spherical bodies of keratinised and usually squamous epithelial cells arranged in a concentric pattern around clusters of degenerating lymphocytes, eosinophils, and macrophages; found in the medulla of the lobules of the thymus. Synonym: Hassall's bodies, Hassall's concentric corpuscle, Virchow-Hassall bodies. (05 Mar 2000) |
| Virchow-Holder angle | An angle formed by the meeting of a line drawn from the middle of the nasofrontal suture to the base of the anterior nasal spine with a line drawn from this last point to the centre of the external auditory meatus. Synonym: Virchow-Holder angle. (05 Mar 2000) |
| Virchow-Robin space | A tunnel-like extension of the subarachnoid space surrounding blood vessels that pass into the brain or spinal cord from the subarachnoid space; the lining of the channel is composed of pia and glial feet of astrocytes; a continuation of the space around capillaries and nerve cells probably does not occur. Synonym: His' perivascular space. (05 Mar 2000) |
| viremia | <virology> The existence of viruses or viral particles in the bloodstream. (11 Jan 1998) |
| vireo | <ornithology> Any one of numerous species of American singing birds belonging to Vireo and allied genera of the family Vireonidae. In many of the species the back is greenish, or olive-coloured. Called also greenlet. In the Eastern United States the most common species are the white-eyed vireo (Vireo Noveboracensis), the redeyed vireo (V. Olivaceus), the blue-headed, or solitary, vireo (V. Solitarius), the warbling vireo (V. Gilvus), and the yellow-throated vireo (V. Flavifrons). All these are noted for the sweetness of their songs. Origin: L, a species of bird. Source: Websters Dictionary (01 Mar 1998) |
Synonyms : United States Virgin Islands
Synonyms :
Synonyms : Antibiotic 899, Virgimycine
Synonyms : Streptococcus viridans
Synonyms :
| virology |
the branch of medical science that studies viruses and viral diseases
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| virtual |
virtual(a): being actually such in almost every respect; "a practical failure"; "the once elegant temple lay in virtual ruin" virtual(a): existing in essence or effect though not in actual fact; "a virtual dependence on charity"; "a virtual revolution"; "virtual reality"
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| virtual image |
a reflected optical image (as seen in a plane mirror)
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| virucidal |
viricidal: tending to destroy viruses
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| Viracept |
nelfinavir: a protease inhibitor (trade name Viracept) used in treating HIV usually in combination with other drugs
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| VIR | wool not used before |
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| VIR | common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers |
| VIR | a legless rectangular harpsichord |
| VIR | in a state of sexual virginity |
| VIR | untouched or undefiled |
| VIR | characteristic of a virgin or virginity |
| VIR | a fold of tissue that partly covers the entrance to the vagina of a virgin |
| VIR | a town in northeastern Minnesota in the heart of the Mesabi Range |
| VIR | a state in the eastern United States |
| VIR | one of the British colonies that formed the United States |
| VIR | the largest city in Virginia |
| VIR | smooth erect herb of eastern North America having entire leaves and showy blue flowers that are pink in bud |