cochlear implant
noun [ C ] medical specialized uk/ˌkɒk.li.ər ˈɪm.plɑːnt/ us/ˌkɑːk.li.ɚ ˈɪm.plænt/
耳蜗植入物，耳蜗埋植（电极）
an electronic device that is put into the inner ear during an operation in order to allow severely deaf people to hear some sounds
cochlear implant surgery 耳蜗植入手术