Permeability, permeable, and semipermeable may refer to:

Chemistry

Semipermeable membrane Semipermeable membrane is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by osmosis. The rate of passage depends on the pressure, concentration, and temperature of the molecul ...

, 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) Permeability is a property of foundry sand with respect to how well the sand can vent, ''i.e.'' how well gases pass through the sand. And in other words, permeability is the property by which we can know the ability of material to transmit fluid/ ...

, a test of the venting characteristics of a rammed foundry sand * 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) {{short description, Percentage of empy volume in a ship Permeability of a space in a ship is the percentage of empty volume in that space. Permeability is used in ship survivability and damaged stability calculations in ship design. In this case, ...

, 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 Permeable Press was a San Francisco-based literary publishing company founded in 1990 by Brian Charles Clark. A "micropress" operating on less than U.S.$100,000 per year, Permeable published a number of trade paperback books, chapbooks, and the li ...

, an American publishing company {{disambiguation