mediastinum
noun medical specialized uk/ˌmiː.di.əˈstaɪ.nəm/ us/ˌmiː.di.əˈstaɪ.nəm/
[ C ] plural mediastina（身体）纵隔
a structure that divides a body part in the centre
a mediastinal tumour 纵隔肿瘤
纵隔腔
the area of the chest that contains the heart and other organs and tissues