Permeability
WordNet
noun
(1) The property of something that can be pervaded by a liquid (as by osmosis or diffusion)
WiktionaryText
Noun
permeability
- the property of being permeable
- the rate of flow of a fluid through a porous material
- a measure of the ability of a rock to transmit water
- a quantitative measure of the degree of magnetization of a material in the presence of an applied magnetic field (measured in Newtons per Ampere squared in SI units).