anelectrotonus

noun

an·​elec·​trot·​o·​nus ˌan-ᵊl-ˌek-ˈträt-ᵊn-əs 

: the decreased irritability of a nerve in the region of a positive electrode or anode on the passage of a current of electricity through it compare catelectrotonus

anelectrotonic

-ˌek-trə-ˈtän-ik 

adjective