English edit

Etymology edit

pervious +‎ -ness

Noun edit

perviousness (uncountable)

  1. The quality or state of being pervious.
    Antonym: imperviousness
    • 1673, Robert Boyle, “(please specify the title)”, in Essays of the Strange Subtilty, Great Efficacy, Determinate Nature of Effluviums. [], London: [] W[illiam] G[odbid] for M[oses] Pitt, [], →OCLC:
      some Philosophers suppose in the pores of Glass, as 'tis a transparent body, or rather in their ranks or rows, may facilitate the Perviousness we above observ'd in Glass

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