penetrability

from WordNet (r) 3.0 (2006)

penetrability
    n 1: the quality of being penetrable (by people or light or
         missiles etc.) [syn: {penetrability}, {perviousness}] [ant:
         {impenetrability}, {imperviousness}]

from The Collaborative International Dictionary of English v.0.48

Penetrability \Pen`e*tra*bil"i*ty\, n. [Cf. F.
   p['e]n['e]trabilit['e].]
   The quality of being penetrable; susceptibility of being
   penetrated, entered, or pierced. --Cheyne.
   [1913 Webster]

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