alternating current
noun [ U ] electronics specialized uk/ˈɒl.tə.neɪ.tɪŋ ˌkʌr.ənt/ us/ˈɑːl.tɚ.neɪ.t̬ɪŋ ˌkɝː.ənt/ (abbreviation AC)
交流电
an electrical current that regularly changes the direction in which it moves
Compare: direct currentDC