an instrument for recording the electrical activity of the brain, usually by means of electrodes placed on the scalp: used to diagnose tumours of the brain,etc
noun [专属名词]脑电图仪;[内科] 脑电描记器
Abnormal brain-wave activity shows up on electroencephalograph readings. 脑电图的读数上显示出异常的脑电波活动。