En·thet'ic (ĕn*thĕt'ĭk) adjective [ Greek 'enqetiko`s fit for inserting; 'en in + tiqe`nai to place.] (Medicine) Caused by a morbific virus implanted in the system; as, an enthetic disease like syphilis. Found on http://www.encyclo.co.uk/webster/E/48