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n. A measure of the ability of a material to resist the formation of an electric field within it.

n. A property of a dielectric medium that determines the forces that electric charges placed in the medium exert on each other.

n. In elec., degree of permittance; the ratio of permittance of a dielectric to that of air.

n. In electricity, degree of permittance; the ratio of permittance of a dielectric to that of air.

"This ability is represented by constants or fixed quantities that are called the permittivity (for electricity) and permeability (for magnetism)."

permittivity of free space   

energy­momentum    er    porosity    surplus-population    stabilities    aeration    value-form    conductivity    pronouns?    isotropic