• (a.) Same as Diathermal.
Di`a·ther'mous adjective Same as Diathermal . 
diathermy, diathermic, diathermia, diathermous, transthermia 1. The therapeutic passing of high-frequency electric currents through the body by means of external electrodes in order to generate heat within the body. 2. Medical diathermy, in which the tissues are warmed but not sufficiently to change their nature. 3. Surgical diathermy, in which the...