ion·to·pho·re·sis \īˌäntəfəˈrēsə̇s\noun (pluraliontophore·ses \-ēˌsēz\) Etymology: New Latin, from ionto- + -phoresis 1.: electrophoresis 2.: the introduction of drugs through intact skin by the transfer of ions effected by means of the application of a direct electric current • ion·to·pho·ret·ic\ī|äntəfə|red.ik\adjective