Permeability, permeable, and semipermeable may refer to:
Chemistry Drug permeability Semipermeable membrane, a membrane which will allow certain molecules or ions to pass through it by diffusion Vascular permeability, the movement of fluids and molecules between the vascular and extravascular compartments Permeation of a gas or vapor through a solid substance
Earth and soil science
Permeability (earth sciences), a measure of the ability of a material (such as rocks) to transmit fluids Relative permeability, in multiphase flow in porous media Permeability (foundry sand), a test of the venting characteristics of a rammed foundry sand Permeability of soils Hydraulic conductivity, the permeability of soil for water
Electromagnetism
Permeability (electromagnetism), the degree of magnetization of a material in response to a magnetic field Vacuum permeability, permeability of free space or magnetic constant, a physical constant, the value of magnetic permeability in a classical vacuum
Vehicles and transport
Permeability (nautical), in ship design, the percentage of empty space in a compartment or tank Permeability (spatial and transport planning), the extent to which the layout of urban forms enables people or vehicles to move in different directions
Other uses Air permeability, characteristic of textile fabrics, measuring the ease of passage of air through them "Impermeable" (song), a song by Ha*Ash Permeable Press, an American publishing company