from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A measure of the ability of a magnetic circuit to conduct magnetic flux; the reciprocal of reluctance.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A measure of the degree to which a material allows a fluid to permeate it.
  • n. The reciprocal of reluctance in a magnetic circuit; the analogue of conductance in an electrical circuit.

from the GNU version of the Collaborative International Dictionary of English

  • n. Permeation

from The Century Dictionary and Cyclopedia

  • n. The act or fact of permeating; permeation.
  • n. In physical, the reciprocal of the reluctance of a magnetic circuit; magnetic conductance.


From Latin permeāre, to penetrate; see permeate.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From stem of Latin permere ("to penetrate") +‎ -ance (Wiktionary)


  • Libertys permeance in American society often makes its manifestations elusive or invisible to those born into it.

    Liberty and Tyranny

  • Her latest post is about the near-permeance of suburban landscapes: "In urban areas, there's rich precedent for the transformation or reuse of abandoned lots or buildings.

    Blogbot - forsiden


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