Meaning of mediastinum
Pronunciation: (mē"dē-a-stī'num), [key]
— pl. -as•ti•na
- a median septum or partition between two parts of an organ, or paired cavities of the body.
- the partition separating the right and left thoracic cavities, formed of the two inner pleural walls, and, in humans, comprising all the viscera of the thorax except the lungs.
- mediastinum (Thesaurus)