au·to·nom·ic nerv·ous sys·tem
noun/ˌɔːtənɒmɪk ˈnɜːvəs sɪstəm/
/ˌɔːtənɑːmɪk ˈnɜːrvəs sɪstəm/
(specialist)- the part of your nervous system that controls processes that are unconscious, for example the process of your heart beating
自主神经系统，植物性神经系统（控制心跳等无意识运动）