The passage or diffusion of a gas, vapor, liquid, or solid through a barrier without physically or chemically affecting it.
The ability of substances to pass through the placental barrier from mother to fetus.
(Of a membrane) the ability to allow some substances to pass through.
Ability of a substance, often a membrane or container, to allow the passage of liquids or substances in solution.
The quality of being permeable; that which may be traversed.