neurosurgery Syllabification: (neu·ro·sur·ger·y)Pronunciation: /ˌn(y)o͝orōˈsərjərē/Definition of neurosurgery noun surgery performed on the nervous system, especially the brain and spinal cord. Derivatives neurosurgeonPronunciation: /ˈn(y)ərōˌsərjən/ noun neurosurgicalPronunciation: /-jikəl/ adjective neurosurgery in other Oxford dictionaries Definition of neurosurgery in the British & World English dictionary