atrio英['ɑ:tri:əʊ]美['ɑ:tri:oʊ]n.火口原,锥间谷;[例句]Some neural cells in ganglions surrounding sino atrial node and atrio ventricular node were also positive to neurofilament.窦房结和房室结周围神经节中的部分神经细胞也呈免疫阳性反应。