(n.) A partition; a septum; specifically, the folds of the pleura (and the space included between them) which divide the thorax into a right and left cavity. The space included between these folds of the pleura, called the mediastinal space, contains the heart and gives passage to the esophagus and great blood vessels.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). mediastinum. Retrieved September 28, 2026, from http://smartdefine.org/mediastinum/definitions/2031364 |
| Chicago | Webster's. 2011. "mediastinum" http://smartdefine.org/mediastinum/definitions/2031364 (accessed September 28, 2026). |
| Harvard | Webster's 2011, mediastinum, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/mediastinum/definitions/2031364>. |
| MLA | Webster's. "mediastinum" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/mediastinum/definitions/2031364> |