noun (plural mediastina /-nə/)Anatomy
A membranous partition between two body cavities or two parts of an organ, especially that between the lungs.
More example sentences
- The tumor, which is often but not always associated with cystic lung lesions, may arise in pulmonary parenchyma, the mediastinum, and pleura.
- On the lateral radiograph there appeared to be herniation of the left lung through the anterior mediastinum.
- The left main bronchus was exposed at the posterior mediastinum and separated from connective tissue.
late Middle English: neuter of medieval Latin mediastinus 'medial', based on Latin medius 'middle'.
- More example sentences
- One patient had extensive cervical, posterior mediastinal, and abdominal lymphadenopathy.
- Two patients presented with masses in the upper lobe of the right lung, simulating posterior mediastinal tumors.
- All men with mediastinal lung masses require a careful testicular examination.
Definition of mediastinum in:
- The US English dictionary