mediastinum

noun
me·​di·​as·​ti·​num | \ ˌmē-dē-ə-ˈstī-nəm How to pronounce mediastinum (audio) \
plural mediastina\ ˌmē-​dē-​ə-​ˈstī-​nə How to pronounce mediastina (audio) \

Definition of mediastinum

: the space in the chest between the pleural sacs of the lungs that contains all the tissues and organs of the chest except the lungs and pleurae also : this space with its contents

Other Words from mediastinum

mediastinal \ ˌmē-​dē-​ə-​ˈstī-​nᵊl How to pronounce mediastinal (audio) \ adjective

First Known Use of mediastinum

15th century, in the meaning defined above

History and Etymology for mediastinum

New Latin, from Medieval Latin, neuter of mediastinus medial, from Latin medius

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Last Updated

23 Apr 2019

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The first known use of mediastinum was in the 15th century

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More Definitions for mediastinum

mediastinum

noun
me·​di·​as·​ti·​num | \ ˌmēd-ē-ə-ˈstī-nəm How to pronounce mediastinum (audio) \
plural mediastina\ -​nə How to pronounce mediastina (audio) \

Medical Definition of mediastinum

1 : the space in the chest between the pleural sacs of the lungs that contains all the viscera of the chest except the lungs and pleurae also : this space with its contents

More from Merriam-Webster on mediastinum

Britannica.com: Encyclopedia article about mediastinum

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