su·per·con·duc·tiv·i·ty 
(s′pər-kŏn′dŭk-tĭvĭ-tē)
(s′pər-kŏn′dŭk-tĭvĭ-tē)n.
The property of certain materials, including certain metals, alloys, and ceramics, to superconduct at temperatures ranging from a fraction of a kelvin to about one hundred kelvin.
su′per·con·ductive (-kən-dŭktĭv) adj.