Definitions beginning with V

Same as Variable Wind Direction; a condition when

(1) the wind direction fluctuates by 60Â° or more during the 2-minute evaluation period and the wind speed is greater than 6 knots; or

(2) the direction is variable and the wind speed is less than 6 knots.

NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Friction Layer, Meteogram, Planetary Boundary Layer, Variable Wind Direction

Variable Wind Direction - permalink - collapse

All > Science > Weather

A condition when

(1) the wind direction fluctuates by 60Â° or more during the 2-minute evaluation period and the wind speed is greater than 6 knots; or

(2) the direction is variable and the wind speed is less than 6 knots.

NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Friction Layer, Meteogram, Planetary Boundary Layer, Variable Wind

variadic - permalink - collapse

All > Technology > Programming > Perl

Said of a "function" that happily receives an indeterminate number of "actual arguments".
Perl - Cite This Source - This Definition
Browse Related Terms: actual arguments, argument, call by reference, call-by-value, formal arguments, function, parameter, prototype, subroutine

Variance - permalink - collapse

All > Business > Real Estate

A special exemption of a zoning law to allow the property to be used in a manner different from an existing law.
US Department of Housing and Urban Development - Cite This Source - This Definition
Browse Related Terms: Building Code, Manufactured home, Manufactured Housing, Mobile home

All > Recreation > Games > Blackjack

The amount of deviation from the expectation you can expect. The house edge on a bet.
Blackjack Hero - Cite This Source - This Definition
Browse Related Terms: Expectation, Expected Win Rate, Fluctuation, Insurance, Rated, Risk of ruin, Standard deviation, Win rate

All > Recreation > Games > Poker

A measure of the up and down swings your bankroll goes through. Variance is not necessarily a measure of how well you play. However, the higher your variance, the wider swings you'll see in your bankroll.
Lee Jones - Cite This Source - This Definition
Browse Related Terms: Center Pot, Family Pot, foul, Heads up, Muck, Short Stack, Side Pot, Split Pot

All > Science > Biotechnology and Genetics > Food Biotechnology

A statistical term representing a measure of the dispersion of data from the overall mean. Used to quantify the variability of a population.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: biometry, correlation, deviation, expected progeny difference, lod score, mean, median, parameter, spatial autocorrelation statistics, Standard deviation, standard error

All > Science > Weather

A measure of variability.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: correlation, GRAD, gradient, Salinity (SAL)

All > Technology > Telecommunications

In statistics, in a population of samples, the mean of the squares of the differences between the respective samples and their mean, expressed mathematically as:
where n is the number of samples, x_i is the value of sample i, is the mean of the samples, and ² is the variance. Note: The square root of the variance, , is the standard deviation.

ATIS - Cite This Source - This Definition
Browse Related Terms: Allan variance, eye pattern, silence code, two-sample deviation

variant - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

An individual that is genetically distinct from others in the population.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: ecotype, Feral, founder principle, Hardy-Weinberg equilibrium, Introgression, meiotic drive, panmictic population, panmixis, Population, population genetics, subspecies, Variation

All > Technology > Telecommunications

One of two or more code symbols having the same plain text equivalent. [INFOSEC-99] 2. One of several plain text meanings that are represented by a single code group. [JP1]
ATIS - Cite This Source - This Definition
Browse Related Terms: Code, code book, code group, code vocabulary, one-part code, speech privacy, syllabary

variant of a key - permalink - collapse

All > Technology > Telecommunications

A new key formed by a nonsecret process with the original key, such that one or more of the nonparity bits of the new key differ from the corresponding bits of the original key. [After X9.8]
ATIS - Cite This Source - This Definition
Browse Related Terms: active key state, base key, color keying, crypto key, derivation key, derived unique key per transaction (DUKPT), Key Bundle, key generation center, key granularity, key integrity, key security, key set, key set identifier, key variable, keying variable, Kts, master key, subscriber data key, TSK, working key

Variation - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Differences between individuals within a population or among populations.
UN Food and Agriculture Organization - Cite This Source - This Definition
Differences in the frequency of genes and traits among individual organisms within a population.
Susan Allender-Hagedorn and Charles Hagedorn - Cite This Source - This Definition
Browse Related Terms: ecotype, Feral, founder principle, Hardy-Weinberg equilibrium, Introgression, meiotic drive, panmictic population, panmixis, Population, population genetics, subspecies, variant

variation monitor - permalink - collapse

All > Technology > Telecommunications

In ac power distribution, a device for sensing deviations of any measured variable, such as voltage, current, or frequency, and capable of initiating a programmed action, such as transfer to other power sources, when programmed limits of voltage, current, frequency, or time are exceeded, or providing an alarm, or both.
ATIS - Cite This Source - This Definition
Browse Related Terms: pulse-repetition frequency (PRF), Rayleigh distribution, UWB

Variations (linguistic) - permalink - collapse

All > Technology > Search > Enterprise Search

Linguistic variations include different spelling variations for the same words. This is typically language specific related to e.g. country differences.
- English: Spelling variations for UK/US/AU, e.g. color/colour
- Portuguese: Brazil vs. Portugal
- German: Spelling reform
A search engine may normalize across spelling variations in a similar way as for lemmatization.

FAST - Cite This Source - This Definition
Browse Related Terms: Accent normalization, lemma, Lemmatization, Lemmatization by expansion, Lemmatization by reduction, linguistic search, Morphologic analysis, morphology, stemming, word stemming

varicose vein - permalink - collapse

All > Medicine > Cancer

A condition in which a vein, most often in the legs, becomes permanently enlarged, twisted, and painful. This may be caused by valves in the vein that don't work properly or by weakness in the vein walls.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: parasomnia, sleep apnea, sleep disorder

variegation - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

The occurrence, within a single tissue, organ or organism, of mosaicism. Usually referring to plants showing either both green and albino colouration in a leaf, or flecks of contrasting colour in a flower. The origin of variegation can be through viral infection, nutritional deficiency, or genetic instability caused by transposon activity. See also: chimera
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: albinism, albino, necrosis

variety - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Subdivision of a species for taxonomic classification. Used interchangeably with the term cultivar to denote a group of individuals that is distinct genetically from other groups of individuals in the species. An agricultural variety is a group of similar plants that by structural features and performance can be identified from other varieties within the same species.
USDA CSREES - Cite This Source - This Definition
1. A naturally occurring subdivision of a species, with distinct morphological characters. 2. A defined strain of a crop plant, selected on the basis of phenotypic (sometimes genotypic) homogeneity.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: cultivar, EDV, essential derivation of varieties, phytochemical, plant genetic resources, Roundup-readyä, Weed

vars - permalink - collapse

All > Technology > Telecommunications

Abbreviation for volt-amperes reactive.
ATIS - Cite This Source - This Definition
Browse Related Terms: BSA, RJE, RTA, TED

VAR/VAD/VASD - permalink - collapse

All > Law > E-Discovery

Value-Added Reseller/Value-Added Dealer/Value-Added Specialty Distributor. Companies or people who sell computer hardware or software and add-value in the process. Usually, the value added is specific technical or marketing knowledge and/or experience.
AmDoc - Cite This Source - This Definition
Browse Related Terms: Customer-Added Metadata, Subjective Coding, User-Added Metadata, Vendor-Added Metadata

varve - permalink - collapse

All > Science > Climate Change

annual layer of sediment deposited in an ocean or lake.
NCDC National Climatic Data Center - Cite This Source - This Definition
Browse Related Terms: benthic foraminifera, diatom, Geosphere, Marine climate, ostracod, planktonic foraminifera, tephra, terrigenous, upwelling

Varved - permalink - collapse

All > Science > Water

A sedimentary bed or lamination that is deposited within one year's time.
Bureau of Reclamation - Cite This Source - This Definition
Browse Related Terms: Alluvial, Alluvium, Bed load, Bed material, Bed-material discharge, Glacial till, Wash load

VAS - permalink - collapse

All > Medicine > Cancer

A tool used to help a person rate the intensity of certain sensations and feelings, such as pain. The visual analog scale for pain is a straight line with one end meaning no pain and the other end meaning the worst pain imaginable. A patient marks a point on the line that matches the amount of pain he or she feels. It may be used to help choose the right dose of pain medicine. Also called visual analog scale.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: Atypical, Constipation, hot flash, Hot flashes, palliation, palpitation, phantom limb pain, psychological, self-esteem, visual analog scale, Zheng (jung)

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variable slope delta modulation - permalink - collapse

variable surface glycoprotein - permalink - collapse

Variable surface glycoprotein (VSG) - permalink - collapse

Variable Wind - permalink - collapse

Variable Wind Direction - permalink - collapse

variadic - permalink - collapse

Variance - permalink - collapse

variant - permalink - collapse

variant of a key - permalink - collapse

Variation - permalink - collapse

variation monitor - permalink - collapse

Variations (linguistic) - permalink - collapse

varicose vein - permalink - collapse

variegation - permalink - collapse

variety - permalink - collapse

vars - permalink - collapse

VAR/VAD/VASD - permalink - collapse

varve - permalink - collapse

Varved - permalink - collapse

VAS - permalink - collapse