Mediastinum is a 11 letter word which starts with the letter M and ends with the letter M for which we found 1 definitions.
Definition |
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(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. |