mediastinum
Americannoun
-
mediastina
plural
-
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.
noun
-
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
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of mediastinum
1535–45; < New Latin; compare mediastīnus of middle class, apparently identical with Latin mediast ( r ) īnus a low-ranking slave, perhaps derivative of medius mid 1, though sense and formation unclear
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In contrast, the parietal pleura is the outer layer that connects to the thoracic wall, the mediastinum, and the diaphragm.
From Textbooks ● Jun. 19, 2013
Within the mediastinum, the heart is separated from the other mediastinal structures by a tough membrane known as the pericardium, or pericardial sac, and sits in its own space called the pericardial cavity.
From Textbooks ● Jun. 19, 2013
The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.
From Textbooks ● Jun. 19, 2013
Figure 19.2 Position of the Heart in the Thorax The heart is located within the thoracic cavity, medially between the lungs in the mediastinum.
From Textbooks ● Jun. 19, 2013
A few irregularly situated dark glandular bodies were observed on the surface of the costal pleura at each side of the sternum, and on the mediastinum.
From An Investigation into the Nature of Black Phthisis or Ulceration Induced by Carbonaceous Accumulation in the Lungs of Coal Miners by Archibald Makellar
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
