Definition of permeability in US English:



  • 1The state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.

    • ‘Pesticide movement is affected by soil texture, permeability, and organic matter content.’
    • ‘Considerable evidence supports the presence of increased small intestinal permeability in Crohn's disease.’
    • ‘The overall passive permeability barrier of the cells depended upon which side was the donor.’
    • ‘Albumin also may be decreased due to increased capillary permeability and leakage in surrounding tissues.’
    • ‘The permeability property of a seed coat should be related to its structure.’
    • ‘The rapid chloride permeability test meets these goals.’
    • ‘Heat has also been observed to induce skin permeability changes.’
    • ‘A model is presented to relate intracellular lifetime to true membrane diffusional permeability.’
    • ‘Unlike intestinal permeability, pulmonary permeability did not seem to be affected by disease activity.’
    • ‘Compaction reduces the permeability of the soil and increases its shear strength and bearing capacity.’
    • ‘The permeability is reduced as the natural clay content or bentonite content increases.’
    • ‘The disturbance of membrane permeability was confirmed by electron microscope.’
    • ‘High concentrations did not significantly affect the permeability of acetone.’
    • ‘But a more fundamental issue was the gas permeability of the polymer.’
    • ‘Two of the five participants had abnormally high permeability; the intestinal permeability of all five decreased.’
    • ‘Texture affects permeability, or the ability of soils to drain water.’
    • ‘Approximately 20 percent of AIDS patients also have abnormal intestinal permeability.’
    • ‘Animal studies have shown it to be of benefit in decreasing vascular permeability and improving vascular tone and blood flow.’
    • ‘In other words, the permeability barrier is selectively transparent for transporter proteins.’
    • ‘One potential consequence of increased intestinal permeability is microbial translocation.’
  • 2Physics
    A quantity measuring the influence of a substance on the magnetic flux in the region it occupies.

    • ‘To derive unitary permeability coefficients, however, a slightly different method is required.’
    • ‘Higher temperatures reaching up to 50°C enhanced cuticular water permeability by approximately one order of magnitude.’
    • ‘He calculated that a material that had a negative permittivity and a negative permeability would also have a negative refractive index.’
    • ‘Generally, solute permeability decreases as the reflection coefficient increases.’
    • ‘The coefficient of permeability remains constant during consolidation.’