neuroscience Syllabification: (neu·ro·sci·ence)Pronunciation: /ˌn(y)o͝orōˈsīəns/Definition of neuroscience noun any or all of the sciences, such as neurochemistry and experimental psychology, which deal with the structure or function of the nervous system and brain. Derivatives neuroscientistPronunciation: /-ˈsīəntist/ noun neuroscience in other Oxford dictionaries Definition of neuroscience in the British & World English dictionary