electrocorticogramPronunciation: /ɪˌlɛktrə(ʊ)ˈkɔːtɪkə(ʊ)gram/Definition of electrocorticogram noun Physiology a chart or record of the electrical activity of the brain made using electrodes in direct contact with it. electrocorticogram in other Oxford dictionaries Definition of electrocorticogram in the US English dictionary