What is another word for Permeance?
Pronunciation: [pˈɜːmɪəns] (IPA) 
Permeance is a term used to describe the ability of a substance to allow fluid to pass through it. Synonyms for permeance include porosity, permeability, and penetrability. Porosity refers to the amount of empty space in a substance that allows fluid to flow through it. Permeability describes the ease with which a liquid or gas can move through a material. Penetrability refers to the ability of a substance to allow fluid to enter or pass through it. Other synonyms for permeance may include diffusion, impregnability, and assimilability. Each of these terms refers to the ability of a substance to allow the flow of liquid or gas through it but each emphasizes a slightly different aspect of this process.
