| VG | van Gieson [stain]; ventricular gallop; volume of gas |
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| vWS | van der Woude syndrome; viewing work station; von Willebrand syndrome |
| equation | 1. A making equal; equal division; equality; equilibrium. "Again the golden day resumed its right, And ruled in just equation with the night." (Rowe) 2. <mathematics> An expression of the condition of equality between two algebraic quantities or sets of quantities, the sign = being placed between them; as, a binomial equation; a quadratic equation; an algebraic equation; a transcendental equation; an exponential equation; a logarithmic equation; a differential equation, etc. 3. <astronomy> A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion. 4. Equation box, or Equational box, a system of differential gearing used in spinning machines for regulating the twist of the yarn. It resembles gearing used in equation clocks for showing apparent time. 5. <astronomy> Equation of the center, the difference between the place of a planet as supposed to move uniformly in a circle, and its place as moving in an ellipse. Origin: L. Aequatio an equalizing: cf. F. Equation equation. See Equate. Source: Websters Dictionary (01 Mar 1998) |
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| Fokker-Planck equation | <radiobiology> An equation that describes the time rate of change of a particle's velocity as a result of small-angle collisional deflections. Applicable when the cumulative effect of many small-angle collisions is greater than the effect of rarer large-angle deflections. (09 Oct 1997) |
| Lineweaver-Burk equation | A rearrangement of the Michaelis-Menten equation, 1/v = 1/Vmax + (Km/Vmax)(1/[S]). Compare: double-reciprocal plot. (05 Mar 2000) |
| Allen, Edgar Van Nuys | <person> U.S. Physician, 1900-1961. See: Allen's test. (05 Mar 2000) |
| Canavan-van Bogaert-Bertrand disease | Autosomal recessive degenerative disease of infancy; mostly in Jewish infants; onset typically within first 3-4 months of birth, consisting of blindness, psychomotor regression, enlarged head, optic atrophy, hypotonia, spasticity, increased N-acetylaspartic acid urinary excretion. MRI shows enlarged brain, decreased attenuation of cerebral and cerebellar white matter, and normal ventricles. Pathologically, there is increased brain volume and weight, and spongy degeneration in the subcortical white matter. See: leukodystrophy. Synonym: Canavan's sclerosis, Canavan-van Bogaert-Bertrand disease, spongy degeneration of infancy. (05 Mar 2000) |
| van | The front of an army; the first line or leading column; also, the front line or foremost division of a fleet, either in sailing or in battle. "Standards and gonfalons, twixt van and rear, Stream in the air." (Milton) Origin: Abbrev. Fr. Vanguard. 1. A fan or other contrivance, as a sieve, for winnowing grain. 2. [OF. Vanne, F. Vanneau beam feather (cf. It. Vanno a wing) fr. L. Vannus. See Etymology above] A wing with which the air is beaten. "[/Angels] on the air plumy vans received him. " "He wheeled in air, and stretched his vans in vain; His vans no longer could his flight sustain." (Dryden) Origin: L. Vannus a van, or fan for winnowing grain: cf. F. Van. Cf. Fan, Van a wing Winnow. <chemical> A shovel used in cleansing ore. Origin: Cornish. <chemical> To wash or cleanse, as a small portion of ore, on a shovel. Source: Websters Dictionary (01 Mar 1998) |
| van Bogaert encephalitis | <neurology> Chronic progressive illness seen in children a few years after measles infection and involving demyelination of the cerebral cortex. Virus apparently persists in brain cells: usually considered a slow virus disease. (18 Nov 1997) |
| van Bogaert, Ludo | <person> 20th century Belgian neurologist. See: Canavan-van Bogaert-Bertrand disease, van Bogaert encephalitis. (05 Mar 2000) |
| van Buchem, Francis Steven Peter | <person> Dutch internist, *1897. See: van Buchem's syndrome. (05 Mar 2000) |
| van Buchem's syndrome | <syndrome> An inherited skeletal dysplasia, with mandibular enlargement and thickening of the diaphyses and calvaria, and increased serum alkaline phosphatase; autosomal recessive inheritance. Synonym: generalised cortical hyperostosis. (05 Mar 2000) |
| van Buren's disease | A disease of unknown cause in which there are plaques or strands of dense fibrous tissue surrounding the corpus cavernosum of the penis, causing deformity and painful erection; sometimes associated with Dupuytren's contracture. Synonym: penile fibromatosis, van Buren's disease. (05 Mar 2000) |
| van Buren sound | A standard sound, available in several calibers, with a gently curved tip designed to follow the contour of the deep bulbous urethra in the male; used for urethral calibration or dilation. (05 Mar 2000) |
| van Buren, William | <person> U.S. Surgeon, 1819-1883. See: van Buren sound, van Buren's disease. (05 Mar 2000) |
| van Creveld, S | <person> Dutch paediatrician, *1894. See: Ellis-van Creveld syndrome. (05 Mar 2000) |
| van Deen, Izaak | <person> Dutch physiologist, 1804-1869. See: van Deen's test. (05 Mar 2000) |