Laboratory Terms V

A glossary of science, chemistry, environmental and laboratory terms.

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28 results match your search term:  V


Vadose Zone
The zone between land surface and the water table within which the moisture c...

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Valued Environmental Attributes
Those aspects(components/processes/functions) of ecosystems, human health, an...

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Vapor
The gas given off by substances that are solids or liquids at ordinary atmosp...

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Vapor Capture System
Any combination of hoods and ventilation system that captures or contains org...

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Vapor Dispersion
The movement of vapor clouds in air due to wind, thermal action, gravity spre...

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Vapor Plumes
Flue gases visible because they contain water droplets.

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Vapor Pressure
A measure of a substance's propensity to evaporate, vapor pressure is the for...

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Vapor Recovery System
A system by which the volatile gases from gasoline are captured instead of be...

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Variance
Government permission for a delay or exception in the application of a given ...

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Vector
1. An organism, often an insect or rodent, that carries disease. 2. Plasmids,...

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Vegetative Controls
Non-point source pollution control practices that involve vegetative cover to...

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Vehicle Miles Travelled VMT
A measure of the extent of motor vehicle operation; the total number of vehic...

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Velocity Pressure
In flowing air, the pressure due to velocity and density of air.

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Ventilation
The act of admitting fresh air into a space in order to replace stale or cont...

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Ventilation Rate
The rate at which indoor air enters and leaves a building. Expressed as the n...

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Venturi Scrubbers
Air pollution control devices that use water to remove particulate matter fro...

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Vinyl Chloride
A chemical compound, used in producing some plastics, that is believed to be ...

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Virgin Materials
Resources extracted from nature in their raw form, such as timber or metal ore.

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Viscosity
The molecular friction within a fluid that produces flow resistance.

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Volatile
Any substance that evaporates readily.

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Volatile Liquids
Liquids which easily vaporize or evaporate at room temperature.

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Volatile Organic Compound VOC
Any organic compound that participates in atmospheric photochemical reactions...

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Volatile Solids
Those solids in water or other liquids that are lost on ignition of the dry s...

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Volatile Synthetic Organic Chemicals
Chemicals that tend to volatilize or evaporate.

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Volume Reduction
Processing waste materials to decrease the amount of space they occupy, usual...

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Volumetric Tank Test
One of several tests to determine the physical integrity of a storage tank; t...

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Vulnerability Analysis
Assessment of elements in the community that are susceptible to damage if haz...

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Vulnerable Zone
An area over which the airborne concentration of a chemical accidentally rele...

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