| permeability (def. 2). |
[pur-mee-uh-bil-i-tee] 
| 1. | the property or state of being permeable. |
| 2. | Also called magnetic permeability. Electricity. a measure of the change in magnetic induction produced when a magnetic material replaces air, expressed as a coefficient or a set of coefficients that multiply the components of magnetic intensity to give the components of magnetic induction. |
| 3. | Geology. the capability of a porous rock or sediment to permit the flow of fluids through its pore spaces. |
| 4. | Aeronautics. the rate at which gas is lost through the envelope of an aerostat, usually expressed as the number of liters thus diffused in one day through a square meter. |
| 5. | Nautical. the capacity of a space in a vessel to absorb water, measured with reference to its temporary or permanent contents and expressed as a percentage of the total volume of the space. |
| magnetic permeability n. The ability of a substance to acquire high magnetization in relatively weak magnetic fields. |
permeability per·me·a·bil·i·ty (pûr'mē-ə-bĭl'ĭ-tē)
n.
The property or condition of being permeable.
The rate of flow of a liquid or gas through a porous material.
| magnetic permeability
A measure of the ability of a substance to sustain a magnetic field, equal to the ratio between magnetic flux density and magnetic field strength. For a vacuum, its value is 1.257 × 10-6 henries per meter. Highly magnetizable materials, such as ferromagnetic materials, have higher magnetic permeability. See also ferromagnetism. |
permeability (pûr'mē-ə-bĭl'ĭ-tē) Pronunciation Key
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