nonpermeable

Adjective

 * 1)  Having the same magnetic permeability as that of free space, so that the material in question has a magnetic permeability $$\mu = \mu_0$$ (where &mu;0 = 4&pi;&times;10&minus;7 N A&minus;2 exactly in SI units).
 * 1)  Having the same magnetic permeability as that of free space, so that the material in question has a magnetic permeability $$\mu = \mu_0$$ (where &mu;0 = 4&pi;&times;10&minus;7 N A&minus;2 exactly in SI units).