Give the best definition of permeability?

the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.

Explanation:

Permeability is as the following says: The property of a magnetizable substance that determines the degree in which it modifies the magnetic flux in the region occupied by it in a magnetic field.

Explanation: Maybe. There's a lot of definitions, but you needed a science one. So I chose the scienc-y one.

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

this is math not biology xd