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.
- me·di·as·ti·nal, adjective
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How to use mediastinum in a sentence
Several lymphatic glands in the anterior part of the mediastinum contained black fluid.An Investigation into the Nature of Black Phthisis | Archibald Makellar
I noted that there was free air and blood in the superior right mediastinum.
There was considerable hematoma in the right lateral portion of the neck and the right superior mediastinum, as I noted.
Next, the diaphragm and all parts of the right mediastinum was examined but no injury was found.
This is a point of great practical importance in determining the extension of inflammation into the mediastinum.
British Dictionary definitions for mediastinum
a membrane between two parts of an organ or cavity such as the pleural tissue between the two lungs
the part of the thoracic cavity that lies between the lungs, containing the heart, trachea, etc
- mediastinal, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012