permeability

1. The property or condition of being permeable.
2. The rate of flow of a liquid or gas through a porous material.

A measure of a material's ability to transmit liquids.
Example: Upon discovery of a Leaking Underground Storage Tank (LUST) the soil beneath it was tested. The greater the permeability, the more rapidly the liquid could reach an underground stream or aquifer.

The degree to which one substance allows another substance to pass through it.

1. The property of a porous material which permits the passage of water vapor through it. Also See permeance.
2. The property of soil, rock, or mantle which permits water to flow through it.

The level or degree of the state of being permeable.

Measure of how much better a material is as a path for magnetic lines of force with respect to air which has a permeability of one. Symbolized by the Greek lower case letter mu (m).

Look up permeability, permeable, or semipermeable in Wiktionary, the free dictionary.

Permeability, permeable and semipermeable have several meanings:

• Permeability (electromagnetism), the degree of magnetization of a material in response to a magnetic field
• Permeability (earth sciences), a measure of the ability of a material (such as rocks) to transmit fluids
• Semipermeable membrane, a membrane which will allow certain molecules or ions to pass through it by diffusion
• Permeability (nautical), in ship design, the percentage of empty space in a compartment or tank
• Permeation of a gas or vapor through a solid substance
• Vascular permeability, the movement of fluids and molecules between the vascular and extravascular compartments
• Permeability (spatial and transport planning), the extent to which the layout of urban forms enables people or vehicles to move in different directions
• Permeability (foundry sand), is a test of the venting characteristics of a rammed foundry sand

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