脑死亡nǎosǐwáng指以大脑功能永久性丧失为死亡标准认定的死亡。严重昏迷,瞳孔放大、固定,脑干反应能力消失,脑波无起伏,呼吸停顿,就可认定为脑死亡。{brain death; death identified by the criterion that all functions of the brain are irreversibly lost. Brain death can be determined when such symptoms occur: serious coma, dilation and fixation of the pupils, loss of the responses of the brainstem, flat brainwave, and cessation of breathing.}