Mediastinum Definition

mēdē-ə-stīnəm
mediastina
noun
A membranous partition between two cavities of the body, esp. that separating the lungs or the two pleural sacs.
Webster's New World
The space between the pleural sacs, containing the heart and other chest viscera excluding the lungs.
Webster's New World

Other Word Forms of Mediastinum

Noun

Singular:
mediastinum
Plural:
mediastina

Origin of Mediastinum

  • New Latin mediastīnum from neuter of Medieval Latin mediastīnus medial, middle from Latin servant employed on general tasks (Medieval Latin anatomical sense probably influenced by Latin intestīnum intestine) from medius middle medhyo- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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mediastinum