mediastinum

[mee-dee-a-stahy-nuh m]

noun, plural me·di·as·ti·na

[mee-dee-a-stahy-nuh] /ˌmi di æˈstaɪ nə/. Anatomy.

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.

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 mid¹, though sense and formation unclear

Related formsme·di·as·ti·nal, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mediastinum

Historical Examples of mediastinum

It has been known to descend along the planes of connective tissue into the mediastinum or into the lungs.
A System of Practical Medicine By American Authors, Vol. II
Various
The subcutaneous tissue, pericardium, mediastinum, and mesenterium contained considerable amounts of fat.
Plague
Thomas Wright Jackson
Several lymphatic glands in the anterior part of the mediastinum contained black fluid.
An Investigation into the Nature of Black Phthisis
Archibald Makellar
This is a point of great practical importance in determining the extension of inflammation into the mediastinum.
A System of Operative Surgery, Volume IV (of 4)
Various

British Dictionary definitions for mediastinum

mediastinum

noun plural -na (-nə) anatomy

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

Derived Formsmediastinal, adjective

Word Origin for mediastinum

C16: from medical Latin, neuter of Medieval Latin mediastīnus median, from Latin: low grade of servant, from medius mean

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

mediastinum in Medicine

mediastinum

[mē′dē-ə-stī′nəm]

n. pl. me•di•as•ti•na (-nə)

A septum between two parts of an organ or a cavity.
The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs.interpleural space mediastinal space

Related formsme′di•as•ti′nal (-nəl) adj.me′di•as•ti′nal•ly adv.