nonpermeable

Meaning

Adjective

• Not permeable.
• Having the same magnetic permeability as that of free space, so that the material in question has a magnetic permeability $\backslash mu\; =\; \backslash mu\_0$ (where μ₀ = 4π×10⁻⁷ N A⁻² exactly in SI units).

Origin

• non- + permeable