Source: wikibot/perm-unit
= Perm (unit)
{wiki=Perm_(unit)}
The perm (short for permeability) is a unit of measurement used to quantify the permeability of materials, particularly in the context of geosciences and engineering. 1. **Definition**: In its most common use, permeability is a measure of a material's ability to transmit fluids, and the perm specifically relates to the flow of a fluid through a porous medium.