en·keph·a·lin /ɪnˈkɛfələn, (ˌ)lɪn, ɛn-/ 腦啡□
en·keph·a·lin /ɪnˈkɛfələn, (ˌ)lɪn/ 名詞
enkephalin n : an endorphin having opiate qualities that occurs in the brain and spinal cord and elsewhere