劍橋詞典[ 可數(shù)名詞：有複數(shù)形式的名詞 ] plural mediastinaa structure that divides a body part in the centre （身躰）縱隔 a mediastinal tumour 縱隔腫瘤 the area of the chest that contains the heart and other organs and tissues 縱隔腔 返回 mediastinum