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English definition of “permeability”

permeability

noun [U] uk   /ˌpɜː.mi.əˈbɪl.ɪ.ti/ us    /ˌpɝː.mi.əˈbɪl.ə.t̬i/ formal
the ability of a substance to allow gases or liquids to go through it: Chalk has a high permeability (= liquids easily pass through it).
(Definition of permeability from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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