"permittivity." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/permittivity>.
permittivity. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/permittivity
A measure of the ability of a material to interact with an electric field and become polarized by the field, so that the field within the material is weaker than the field in the absence of the material. The permittivity of a material is the product of the dielectric constant of the material and the permittivity of a perfect vacuum, which is defined to be about 8.854 × 10−12 farad per meter.