Visibility factorsConditions or other phenomena that affect the visibility or appearance of an object or a landscape.
Visibility Protection ProgramThe program specified by the Clean Air Act to achieve a national goal of remedying existing impairments to visibility and preventing future visibility…
Visibility Range (or Visibility)The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizons sky in daylight.
visibility timeoutThe period of time that a message is invisible to the rest of your application after an application component gets it from the queue.
Visible Electro- OpticsTechnologies/techniques employed by optical sensors in the visible portion of the wavelength spectrum.
Visible LightElectromagnetic radiation from about 400 to 700 nm, which is detectable by the human eye.
Visible Light TransmittanceThe amount of visible light that passes through the glazing material of a window, expressed as a percentage.
Visible MassMass that gives off electromagnetic radiation, so that it can be detected. It is ordinary (baryonic) matter.
Visible RadiationThe visible portion of the electromagnetic spectrum with wavelengths from 0.4 to 0.76 microns
Visible Satellite ImageryThis type of satellite imagery uses reflected sunlight (this is actually reflected solar radiation) to see things in the atmosphere and on the Earth's…
visible spectrumThe region of the electromagnetic spectrum that can be perceived by human vision, approximately the wavelength range of 0.4 m to 0.7 m.
Visible UniverseThe part of the entire universe from which light would have had time to reach us in the age of the universe.
visilizumabA monoclonal antibody that binds to CD3 (a substance found on T-cells) and that is being studied as a treatment for graft-versus-host disease (GVHD).
Vision or Vision CoverageA type of health benefit that at least partially covers vision care, like eye exams and glasses.
Visitor dayTwelve visitor hours which may be aggregated by one or more persons in single or multiple visits.
Visitor useVisitor use of recreation and wilderness resource for inspiration, stimulation, solitude, relaxation, education, pleasure, or satisfaction.
Visual absorption capabilityThe physical capacity of a landscape to accept human alterations without loss of its inherent visual character or scenic quality.
visual analog scale(VIH-zhoo-ul A-nuh-log skayl) A tool used to help a person rate the intensity of certain sensations and feelings, such as pain.
Visual attentionNoticing and focusing of vision on a particular object or landscape element.
Visual ChangesDiabetes-induced vision problems are an alteration from a person's normal vision due to changes in the small arteries that provide blood for the retina.
visual channelA means for delivering video frames from one point to another; a sequence of frames submitted to the channel input results in a similar (not necessarily…
Visual clutterThe complex visual interplay of numerous disharmonious landscape characteristics and features resulting in a displeasing view.
Visual contrastOpposition or unlikeness of different forms, lines, colors, or textures in a landscape.
Visual disharmonyA state of disagreement, incongruity, or disproportionate arrangement of forms, lines, colors, and textures in the visual elements of a seen landscape.
Visual featureAn element, such as a land or water form, vegetation, or structure in the seen landscape.
Visual harmonyA pleasing array of visual elements in a landscape, usually as a result of a sense of visual order, compatibility, and completeness between and among the…
Visual impactAny modification in land forms, water bodies, or vegetation, or any introduction of structures, which negatively or positively affect the visual character…
Visual intrusionAny human-caused change in the land form, water form, vegetation, or the addition of a structure which creates a visual contrast in the basic elements…
Visual mitigationActions taken to avoid, eliminate, or reduce potential adverse impacts on scenic resources.
visual pathway glioma(...glee-OH-muh) A rare, slow-growing tumor that usually forms in the optic nerve, optic chiasm, or optic tract.
Visual Resource Management (VRM) Class DesignationsClass I objective is to preserve the existing character of the landscape. The level of change to the characteristic landscape should be very low and must…
Visual Resource Management (VRM) ClassesCategories assigned to BLM lands, utilizing the Visual Resource Inventory Classes in the RMP process, with an objective which prescribes the amount of…
Visual Resource Management (VRM) SystemBLM's system for minimizing the visual impacts of surface-disturbing activities and maintaining scenic values for the future.
Visual resourcesRefers to all objects (man-made and natural, moving and stationary) and features such as landforms and water bodies that are visible on a landscape.
Visual sensitivityPublic concern for the maintenance of scenic quality in a particular landscape setting.
Visual SpectrumThe portion of the electromagnetic spectrum to which the eye is sensitive, i.e., light with wavelengths between 0.4 and 0.7 micrometers.
visual stratigraphyprocess of identifying different layers in ice, rock, sediment, or other deposit, based on visually apparent distinctions such as color or other…
visual telephone servicesA group of audiovisual services including videophone as defined in ITU-T Recommendation F.
Visual unityThe quality or state of appearing to be united in principles and relationships or to be logically and aesthetically connected because of the visual…
vitalNecessary to maintain life. Breathing is a vital function.
Vital RecordA record that is essential to the organizations operation or to the reestablishment of the organization after a disaster.
vital recordsRecords necessary to the life or continuity of an organization.
vital records centerA repository for housing records classified as vital to an organization's operations.
vitaminA key nutrient that the body needs in small amounts to grow and stay strong. Examples are vitamins A, C, and E.
vitamin A(VY-tuh-minâ¦) One of several vitamins that the body needs in small amounts to function and stay healthy.
vitamin A acid(VY-tuh-min...A-sid) A form of vitamin A that is made by the body, and can also be made in the laboratory.
vitamin B12(VY-tuh-min ...) A vitamin that is needed to make red blood cells and DNA (the genetic material in cells) and to keep nerve cells healthy.
vitamin B6(VY-tuh-minâ¦) A key nutrient that the body needs to break down proteins, carbohydrates, and fats in food for healthy blood, skin, and nerves.
vitamin C(VY-tuh-minâ¦) A key nutrient that the body needs to fight infection, heal wounds, and keep tissues healthy, including the blood vessels…
vitamin DA nutrient that helps the body use calcium and phosphorus and make strong bones and teeth. It is found in fatty fish, eggs, and dairy products.
vitamin EA substance used in cancer prevention. It belongs to the family of drugs called tocopherols.
vitamin KA substance that promotes the clotting of blood.
vitamin Q10A substance found in most tissues in the body, and in many foods. It can also be made in the laboratory.
VitaminsVarious substances that are essential in minute quantities to the nutrition of animals and plants.
vitrectomyAn operation to remove the blood that sometimes collects at the back of the eyes when a person has eye disease.
vitreous humor(VIH-tree-us HYOO-mer) The clear jelly-like substance that fills the inside of the eyeball. As a person ages, the vitreous humor becomes more liquid.
vitreous silicaGlass consisting of almost pure silicon dioxide (SiO2). Synonym fused silica.
vitrifiedCultured tissue having leaves and sometimes stems with a glassy, transparent or wet and often swollen appearance.
vivipary1. A form of reproduction in animals in which the developing embryo obtains its nourishment directly from the mother via a placenta or by other means. 2.
Vivitrol(VIH-vih-trol) A drug that blocks the action of opiates (drugs used to treat pain).
VLANVirtual local area network. A LAN created via software rather than dedicated hardware.
VLAN (virtual local area network)partitioning available network resources into independent groups to insulate related traffic and reduce management complexity.
VmaxThe maximal rate of an enzyme-catalysed reaction. Vmax is the product of Eo (the total amount of enzyme ) and Kcat (the catalytic rate constant).
VMDVolume median diameter. A statistical measure of the average droplet size in a spray cloud, such that fifty percent of the volume of sprayed material is…