Noun: mediastinum (mediastina) ,mee-dee-u'stI-num
- The part of the thoracic cavity between the lungs that contains the heart and aorta and oesophagus and trachea and thymus
"A tumour in the mediastinum can affect multiple vital organs"
Derived forms: mediastina
Type of: bodily cavity, cavity, cavum
Part of: chest cavity, thoracic cavity
Encyclopedia: Mediastinum