permeability
noun
per·me·abil·i·ty ˌpər-mē-ə-ˈbi-lə-tē 
1
: the quality or state of being permeable
2
: 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
Example Sentences
Recent Examples on the Web The glowing gold stars are astrocytes: these cells control the permeability of the blood-brain barrier and are named for their starlike shape. 
Liz Tormes, Scientific American, 26 Aug. 2022 Lesson: Brands should embrace the four basic requirements for equipment: less is more, permeability, protection and safety, and identity/membership of community. Amelia Arvesen, Outside Online, 19 Mar. 2019 The Utah array is insulated with parylene, a protective polymer coating used in the medical device industry for its stability and low permeability to moisture. WIRED, 19 Aug. 2022 The second denotes vapor permeability, also known as breathability—from 5,000 grams for high to 20,000 grams for minimal. Kelly Bastone, Outside Online, 18 June 2021 Insulation’s air permeability is measured in cubic feet per minute. Kelly Bastone, Outside Online, 18 June 2021 Its wind permeability is slightly behind that of NeoShell, but given its ability to genuinely withstand heavy rainfall, that’s not necessarily a bad thing. Wes Siler, Outside Online, 18 Sep. 2021 This permeability helps with exfoliation, but experts recommend keeping your face-steaming sessions short to avoid accidentally making your skin drier. Mara Santilli, SELF, 28 Feb. 2022 Indeed, the vitality of Sherlock probably owes a lot to the permeability of Conan Doyle’s reality, lived on both sides of the page. Jonathon Keats, Forbes, 31 Jan. 2022 See More
Liz Tormes, Scientific American, 26 Aug. 2022 Lesson: Brands should embrace the four basic requirements for equipment: less is more, permeability, protection and safety, and identity/membership of community. Amelia Arvesen, Outside Online, 19 Mar. 2019 The Utah array is insulated with parylene, a protective polymer coating used in the medical device industry for its stability and low permeability to moisture. WIRED, 19 Aug. 2022 The second denotes vapor permeability, also known as breathability—from 5,000 grams for high to 20,000 grams for minimal. Kelly Bastone, Outside Online, 18 June 2021 Insulation’s air permeability is measured in cubic feet per minute. Kelly Bastone, Outside Online, 18 June 2021 Its wind permeability is slightly behind that of NeoShell, but given its ability to genuinely withstand heavy rainfall, that’s not necessarily a bad thing. Wes Siler, Outside Online, 18 Sep. 2021 This permeability helps with exfoliation, but experts recommend keeping your face-steaming sessions short to avoid accidentally making your skin drier. Mara Santilli, SELF, 28 Feb. 2022 Indeed, the vitality of Sherlock probably owes a lot to the permeability of Conan Doyle’s reality, lived on both sides of the page. Jonathon Keats, Forbes, 31 Jan. 2022 See More Word History
First Known Use
1759, in the meaning defined at sense 1
Medical Definition
permeability
noun
per·me·abil·i·ty ˌpər-mē-ə-ˈbil-ət-ē
plural permeabilities
: the quality or state of being permeable