- in·ten·sio·nom·e·ter (in-ten″se-o-nomґə-tər) an ionometric instrument for measuring the intensity of x-rays. Two series of plates, separated by an air gap that serves as the dielectric, are connected to opposite terminals in a closed chamber. An electric circuit is completed when the air becomes ionized by the x-rays, and the difference in electric potential is registered by deflection of a galvanometer needle.
Medical dictionary. 2011.